Homework Help: Science: Biology

Recent Homework Questions About Biology

college biology
What does enhance genetic diversity?
Tuesday, November 17, 2009 at 9:26pm

Biology
Okay, I need help. "If short hair (L) is dominant to long hair (l), then what fraction of the offspring produced by a cross of Llxll will be homozygous dominant? a) 1/2 b) 1/4 c) 1/3 d) none (no change of this offspring) The key says that it's d, but when I do the ...
Tuesday, November 17, 2009 at 8:20pm

biology phenotypes
If the parents are PPLLXppll, then the F1 generation is PpLl. Say that the F1 generation is crossed with PPLL. It would be a cross between PpLl X PPLL. Then what is the F1 generation or in other words what are the different gametes I can use to make a F2 generation punnett ...
Tuesday, November 17, 2009 at 6:58pm

Biology
ok give me examples of a ploymer that follows these conditions it must have at least 100 atoms it must have at least 3 monomers it must be organic, from a living thing thanks so much!
Sunday, November 15, 2009 at 7:21pm

biology
In trisomy 21, most nondisjunction events take place during female meiosis rather than male meiosis. What might be one factor that can account for this difference? A) Female meiosis is more difficult than male because the gamete is much larger B) Female meiosis takes place in ...
Sunday, November 15, 2009 at 3:08pm

biology
I am doing a project on the effects of various colors on plant growth. I have a part on my project that says I have to write about the lights, and plant table used. I am lost, does anyone know what might refer to? Please help
Saturday, November 14, 2009 at 11:16pm

Advance Biology
What is the definition for codon recognition?
Friday, November 13, 2009 at 6:54pm

Biology
A mutant protist is found in which some mitochondria lack an inner mitochondrial membrane. Whcih of the following pathways would be completely disruped in these mitochondria? a) the citric acid cycle. b) oxidative phosphorylation. c) the citric acid cycle and glycolysis. d) ...
Friday, November 13, 2009 at 6:47pm

Biology
Which of the following must occur for a plant or animal to grow and develop normally? a) Sufficient oxygen must be available to stimulate cell division. b) Theorganism must recive a supply of the appropriate horones from its parents. c) It must be able to control the timing ...
Friday, November 13, 2009 at 6:40pm

Biology
What is probably the main factor responsible for the phenomenon of density-dependent inhibition? a) a local deficiency of nutrients b) cells' innate "sense" of knowing when the organ of which they are a part has no need for additional cells. c) a shortage of ...
Friday, November 13, 2009 at 6:34pm

Biology
Hello. I've done well with everything else, but I'm stuck on the following: 1. Herring are salt-water fish. They A - need to expel large amounts of water to offset osmosis B - need to take in large amounts of water to offset osmosis C - slowly dehydrate over the course...
Friday, November 13, 2009 at 3:04am

Biology
Hi, I was looking at phylogenetic trees and I was wondering, how do u root the universal tree of life? Like for eukurya, archea, abd bacteria.. how do we know where to put the root? thanks!
Thursday, November 12, 2009 at 11:23pm

Biology
Bio question relating to the respiratory tract? Recent research has shown that cigarette smoke may result in the following: i.)Destruction of the cilia that line parts of the respiratory system ii.) Rupturing the walls of the same alveoli iii.) Thickening of the walls of the ...
Thursday, November 12, 2009 at 9:01pm

Biology
If a light switch is moved from the "off" postition to the "on" position, then the light will go on. This statement is what? a) can be tested. b) is a conclusion. c) is the result of deductive reasoning. d) can be falsified. e) All of the choices are correct.
Thursday, November 12, 2009 at 8:54pm

Biology
if a person has stooped breathing and is receiving pulmonary resuscitation, would it be better to administer pure oxygen or a mixture of carbon dioxide/oxygen?why? Smoking, air pollution and altitude all affect the rate of respiration. Explain the effects of each of these on ...
Thursday, November 12, 2009 at 8:47pm

Biology
Respiratory system questions? How could expiration be aided by thoracic and abdominal wall muscles? why does a throat infection cause your voice to produce lower pitched sounds?
Thursday, November 12, 2009 at 7:21pm

Biology
Carbon dioxide transport in the human body? Explain why the majority of the carbon dioxide is transported in the forms of bicarbonate ions.
Thursday, November 12, 2009 at 7:20pm

Biology
Why is DNA replication a necessity in cells?
Thursday, November 12, 2009 at 1:36pm

biology
How would lgiht reaction be affected if there were no concentration gradient across the thlykoid membrane?
Thursday, November 12, 2009 at 11:12am

Biology
Respiratory system questions? how does cigarette smoking affect the mucous layer in the bronchioles why does the buildup of tar in the bronchioles limit air flow in what area does a tumor begin to develop
Wednesday, November 11, 2009 at 7:19pm

biology
can someone explain photosynthesis
Wednesday, November 11, 2009 at 6:45pm

biology
One rule of probability can be expressed as the following: The probability of two independent events occurring simultaneously is the product of the probability of their occurring separately. If, for example, you had a pair of dice and rolled each die one at a time, what would ...
Wednesday, November 11, 2009 at 4:57pm

Biology
1 What is the organelles that package and stor proteins (2 words) ?
Wednesday, November 11, 2009 at 4:45pm

biology
A cross between two pea plants with axial flowers and inflated pods gives the following offspringg: 20 with axial flowers and inflated pods, 7 with axial flowers and constricted pods, and 5 with terminal flowers and inflated pods. What is the most probable genotype for the two...
Wednesday, November 11, 2009 at 2:29pm

Biology
What are Five internal structures of plant or animal cells and describe their functions in your own words.
Wednesday, November 11, 2009 at 12:21am

Biology I
Hi! Hoping someone knows this/has some on hand. Without being combined with anything, what colour is Pb(C2H302)2 (lead acetate)? My lab partners and I forgot to note the original colour. Please help if you can. I googled it, but couldn't find an answer. Thanks!
Tuesday, November 10, 2009 at 10:30pm

Biology 100
Choose one theory spontaneous generation theory or cell theory. Select one statement that corresponds to the theory you want to refute or suppot. I choose cell theory and the one statement that I choose is all living things are made up of cells. Provide evidence for or against...
Tuesday, November 10, 2009 at 3:26am

Biology
What is the effect of pH and temperature on the activity of a catalase?
Monday, November 9, 2009 at 8:41pm

Biology
What enzyme does yeast produce?
Monday, November 9, 2009 at 8:23pm

Advance Biology
Compare mitosis and meiosis by completeing the chart. Mitosis- Meiosis-homologous chromosomes pair and then seperate Mitosis- Meiosis-needed for sexual reproduction
Monday, November 9, 2009 at 5:51pm

Biology
The ability to roll the tongue (R) is determined by a dominant gene while the recessive gene results in the inability to roll the tongue (r). A man and his wife can both roll their tongues and are surprised to find that their son cannot. Explain this by showing the genotypes ...
Monday, November 9, 2009 at 3:59pm

Biology
We are looking at hyperaccumulating plants, and I wanted to know what happens to the heavy-matals in the plant when the plant dies. Do they go back into the soil as a contaminant, do they simply "leave" as non-toxic elements etc? If you could help me that would be ...
Monday, November 9, 2009 at 1:50pm

biology
The ability to roll the tongue (R) is determined by a dominant gene while the recessive gene results in the ability to roll the tongue (r). A man and his wife can both roll their tongues and are surprised to find that their son cannot. Explain this by showing the genotypes of ...
Monday, November 9, 2009 at 12:52pm

biology
Zola has a splinter in her finger. which of the following actions should she take before she uses a sewing needle to remove the splinter?Give reasons for your answer. a- wipe the needle with a clean cloth. b- wash the needle in hot soapy water. c- pass the needle through a ...
Monday, November 9, 2009 at 4:39am

biology
what would happen if Australia had no laws to check imported goods
Monday, November 9, 2009 at 4:35am

biology
can fatty acids pass through the placenta?
Monday, November 9, 2009 at 12:41am

excretion
Question: which is an example of excretion? a) release of sweat from the sweat glands b) removal of carbondioxide from the lungs Please tell me what is the answer. I thought both urea(from the sweat) and CO2 are products of excretion? In fact, my textbook says that "...
Sunday, November 8, 2009 at 11:50pm

biology
skin cells seem to fit together like pieces of a jigsaw puzzle how is this arrangement of cells helpful to an organism?
Sunday, November 8, 2009 at 4:37pm

biology
can SCIATIC PAIN be ..cured? if yes..then forever or for sometime?
Friday, November 6, 2009 at 2:33pm

biology
How is ATP involved in maintaining the sodium and potassium gradients across a cell membrane.
Wednesday, November 4, 2009 at 11:24pm

Biology
Help with my course work 3 strips of potatoes of equal sizes are put into water, weak sucrose and strong sucrose solution. As far as prediction goes I know happens. But what is the aim of this experiment? I came up with this aim- To illustrate movement of water molecules in ...
Wednesday, November 4, 2009 at 8:18pm

math
the biology club budgeted $200 for their pancake breakfast. each meal costs $1.50 to prepare. write an inequality that represents the number of meals that can be prepared without going over the budget.
Wednesday, November 4, 2009 at 1:19pm

Biology
Can you explain this question A person who has been sunbathing all day eats a salts tablet.
Wednesday, November 4, 2009 at 10:45am

Biology
What effect does cooking have on liquid protein
Tuesday, November 3, 2009 at 8:51pm

Biology
What effect does cooking have on sunflower oil.
Tuesday, November 3, 2009 at 6:55pm

Biology
How does bacteria reproduce and how can I show it in a cartoon? In a way that a appropriate? Please help me.. Thank you!
Tuesday, November 3, 2009 at 6:44pm

biology
IN THE EPIDEMIS WHAT THREE THING CAN PASS THOUGH THIS OPENING
Tuesday, November 3, 2009 at 6:36pm

biology
the guared cell produce an opening called a stom
Tuesday, November 3, 2009 at 6:10pm

biology
mesaphyll layer palisade and spongy
Tuesday, November 3, 2009 at 6:00pm

biology
examine the intetnet structure of the leaf drawn say how the different layer are suiled for the function of photosynthes
Tuesday, November 3, 2009 at 5:48pm

Biology
Can someone help me. I need to know for nervous tissue, it's defined by ??? I have a worksheet and have gone through all the other ones, but my book or a web site hasn't helped me with finding the nervous tissue. I know the 2 kinds, neurons and glia, but need to know ...
Tuesday, November 3, 2009 at 5:29pm

Biology
What effect does cooking have on each of the following: a) starch b) cellulose c) butter d) sunflower oil e) liquid protein.
Tuesday, November 3, 2009 at 5:02pm

Biology
In what kind of food is each of the following substances found: a)lactose b)sucrose c)cellulose d)sunflower oil e)liquid protein.
Tuesday, November 3, 2009 at 4:50pm

biology
Give four reasons why we need food.
Tuesday, November 3, 2009 at 4:35pm

living enviroment
how do yuh break the the spermatogenesis and get the meaning for example biology bio=life ; logy = study of
Tuesday, November 3, 2009 at 7:18am

biology
What are minerals? Give names of a few minerals and details of the following: 1 Iron and calcium 2 Iodine and phosphorus
Monday, November 2, 2009 at 7:54am

Biology
Briefly distinguish the difference between inductive and deductive reasoning. Are the groups of statements below examples of an inductive or deductive process?
Monday, November 2, 2009 at 1:37am

Ap Biology
During aerobic respiration, glucose is broken down to form several end products. Which end products contain the carbon atoms from glucose? The hydrogen atoms from glucose? The oxygen atoms from glucose? The energy stored in the glucose molecules?
Sunday, November 1, 2009 at 8:25pm

Repost- Biology
A scientist separates plant pigments from leaf, root, and stem samples by paper chromatography. All the leaf chromatographs include yellow green and blue green spots but none of the root and only a few of the stem chromatographs have these green spots. Many of the samples have...
Sunday, November 1, 2009 at 6:05pm

Advance Biology
What is the relationship between CFCs and the Earth's protective layer?
Sunday, November 1, 2009 at 5:52pm

Advance Biology
I need help writting exactly 25 words to describe the relationship between CFCs and the Earth's protective ozone layer.
Sunday, November 1, 2009 at 3:32pm

Biology
A scientist separates plant pigments from leaf, root, and stem samples by paper chromatography. All the leaf chromatographs include yellow green and blue green spots but none of the root and only a few of the stem chromatographs have these green spots. Many of the samples have...
Sunday, November 1, 2009 at 1:41am

Biology
Please answere these questions: identify each statement as observation, hypothesis, or prediction and then tell if it is inductive or deductive Male Red-winged Blackbirds display red wing patches to signal superiority to other males A male Red-winged Blackbird displays his red...
Sunday, November 1, 2009 at 12:36am

Biology
Givin these 9 hypothesis we are supposed to state if they are inductive or deductive 1. Male Red-winged Blackbirds display red wing patches to signal superiority to other males 2. Bees make honey 3. Male red-winged Blackbirds compete for territories and there are 6 other ...
Saturday, October 31, 2009 at 12:51pm

Biology
What are two autotrphs that don't use sunlight? How might these organisms provide clues to exterrestrial life?
Friday, October 30, 2009 at 10:35pm

Biology
compare and contrast plant mitosis and animal mitosis *focus on cytokenesis*
Friday, October 30, 2009 at 9:29pm

Biology Lab
What tense do you use when writing a discussion in a formal lab?
Friday, October 30, 2009 at 6:53pm

biology
Give examples of animal and plant cells.
Friday, October 30, 2009 at 1:34pm

biology
Describe how animal and plant cells are different.
Friday, October 30, 2009 at 11:02am

Biology
Why do some cells have a higher concentration of mitchondria in a eukaryotic organism/ What are some examples of these cells? Thanks In Advance
Thursday, October 29, 2009 at 5:45pm

biology
Small molecules are combined to form large molecules by the life function of... please help!! URGENT!
Wednesday, October 28, 2009 at 9:02pm

Biology
Sorry, I have one more question... what can be concluded about effects of RpoS and OxyR on KatE expression? I've looked online but I've only found experiments which I do not understand. Could someone please clarify? Thanks!!!
Wednesday, October 28, 2009 at 10:52am

Biology
How do you test the effect of RpoS on oxyR expression? I cannot find information on this topic anywhere... please help me out! Thanks you!
Wednesday, October 28, 2009 at 10:50am

biology
In D. virilise, the mutations dusky body (dy), cut wings (ct) and white eyes (w) are all recessive alleles located on at different places on the x chromosome. Females heterozygous for all three mutations were crossed to dy ct w males, and the following phenotypes were obtained...
Wednesday, October 28, 2009 at 9:38am

Biology
How well would a plant grow under pure yellow light? Explain. Really had no ideas on this... Thank You.
Wednesday, October 28, 2009 at 4:01am

Biology
Olga Oompah has red hair and marries Oliver Oompah who has blue hair. They have 32 children. What is the color of their children's hair? This has to do with the punnet squares!
Tuesday, October 27, 2009 at 6:35pm

biology
substances that can pass through cell membranes by diffusion include?
Tuesday, October 27, 2009 at 4:18pm

Biology
What is an example of inductive reasoning and deductive reasoning pertaining to health care
Tuesday, October 27, 2009 at 2:27pm

Biology
How is it possible for a stem to give rise to roots?
Tuesday, October 27, 2009 at 11:22am

biology
I am trying to find three plants that belong to the same species, with both their common and Latin names.
Tuesday, October 27, 2009 at 8:35am

biology
how do you distinguish between an observation, hypothesis, and a prediction?
Sunday, October 25, 2009 at 9:22pm

biology
describe the role of mitochondria in the metabolism of eukaryotic cells.
Saturday, October 24, 2009 at 2:07pm

biology
how was vinegar able to remove the calcium shell of an egg?
Saturday, October 24, 2009 at 12:50pm

Biology
Which is the most common complex carbohydrate on earth? A. Starch B. Glycogen C. Cellulose D. Hemicellulose E. Chitin
Saturday, October 24, 2009 at 1:47am

Biology
Which monosaccharide requires the most steps to proceed through glycolysis? A. Glucose B. Galactose C. Fructose
Saturday, October 24, 2009 at 1:47am

Biology
Anaerobic fermentation in yeast produces (include all of the final products). A. Lactic acid, NAD and CO2 B. Lactic acid and NADH C. Lactic acid, NADH and CO2 D. Lactic acid and NAD E. Ethanol and CO2 F. Ethanol, NADH and CO2 G. Ethanol, NAD and CO2 H. Acetaldehyde and NADH
Saturday, October 24, 2009 at 1:45am

Pre-Ap biology
After an organism is gully grown, cell division continues to function in renewal and repair, replacing cells that die from ________________ During the growth phase (for a cell) known as _____________...is this one interphase? The mitotic phase itself consists of 2 stages ...
Friday, October 23, 2009 at 5:31pm

biology
Name an adaptation of acoelomate or pseudoceelomates explain how it developed and why. discuss the role DNA played in the development of this trait
Thursday, October 22, 2009 at 10:10pm

biology
two or more compounds combined but keep their chemical identity a.solution b.carohydrates cproteins or d.isotope
Thursday, October 22, 2009 at 2:11pm

Biology
how is it possible for a stem to give rise to roots?
Thursday, October 22, 2009 at 11:49am

biology
What follows is a hypothetical situation. Genes that produce chlorophyll in plants are inserted into the chromosomes of cattle. Indicate some of the possible advantages of this procedure. - I'm guessing mutation happens but I don't know what's the advantages to it ...
Thursday, October 22, 2009 at 3:21am

biology
what is cell division called
Thursday, October 22, 2009 at 12:33am

biology
what are they differenves between eprokaryotes& prokaryotes?
Wednesday, October 21, 2009 at 6:11pm

Biology
How is the expression of sex-linked genes similar to the expression of autosomal genes?
Wednesday, October 21, 2009 at 2:38pm

Biology
How is the expression of sex-linked genes similar and different from the expression of autosomal genes?
Wednesday, October 21, 2009 at 1:46pm

biology
How does the interaction between a carrier protein and the substance it transports resemble the interaction between an enzyme and its substrate?
Wednesday, October 21, 2009 at 12:21am

biology
How does the interaction between a carrier protein and the substance it transports resemble the interaction between an enzyme and its substrate?
Wednesday, October 21, 2009 at 12:08am

Biology
How is the expression of sex-linked genes similar and different from the expression of autosomal genes?
Wednesday, October 21, 2009 at 12:02am

biology
if a solution has a pH of 4 mix to a solution that has a pH of 9 what will be the pH of the mixed solution? will it be acidic or base? please show me how to calculate it.please i need the answer before tomorrow morning. thank you so much. I had been to other sites but i didn&#...
Tuesday, October 20, 2009 at 10:37pm

Biology
How is the expression of sex-linked genes similar and different from the expression of autosomal genes?
Tuesday, October 20, 2009 at 9:44pm

Biology
"wherever in the universe life exists, some of those life forms must be colored" is this true? if so please explain
Tuesday, October 20, 2009 at 8:22pm

Biology
Is a enzyme a protein or is a protein an enzyme? Explain. I have no idea please help me thank you
Tuesday, October 20, 2009 at 8:19pm

micro biology
what would a spore former (bacteria) look like if you forgot the safranin stain?
Tuesday, October 20, 2009 at 7:43pm

Biology
I am having trouble descibing how the expression of sex-linked genes is similar and different from the expression of autosomal genes?
Tuesday, October 20, 2009 at 7:31pm

biology
I have a question about reduced and oxidized chemicals and potenital enery. Reduced have weaker PE because they hold on to their electrons and oxidized have strong PE because they can let go electrons right? If I am right then why is that CO2 has a low PE because Oxygen is ...
Tuesday, October 20, 2009 at 2:39pm

Biology
Which trophic level gets the least amount of energy? a) producers b) herbivores c) carnivores d) decomposers I think the answer is c, but i'm not sure if it's right. I posted this question earlier, but google didn't provide with an answer. I still think the answer ...
Tuesday, October 20, 2009 at 7:06am

Biology!
1. Urea is made where? Is it in the kidneys or the liver? 2. Which trophic level gets the least amount of energy? a) producers b) herbivores c) carnivores d) decomposers I think the answer is c, but i'm not sure if it's right.
Monday, October 19, 2009 at 11:37pm

biology
how might a change in pH affects the function of an enzyme hexokinase? please help i need the answer badly! thank you!
Monday, October 19, 2009 at 10:45pm

biology please help!
the answer for each is a cell part what is the powerhouse of a cell & site of ATP production? what supports the shape of the entire cell what is involved in muscle contraction in larger organisms
Monday, October 19, 2009 at 4:07pm

biology
what is the powerhouse of a cell & site of ATP production? what supports the shape of the entire cell what is involved in muscle contraction in larger organisms
Monday, October 19, 2009 at 3:34pm

biology
what are organisms that can synthesize energy-containing organic compounds? organisms that add to the total energy stored in organic compounds? organisms that require sunlight in order to survive? choices: a) autotrophs b) heterotrophs c) both any help is greatly appreciated! :)
Sunday, October 18, 2009 at 10:59pm

Biology
The reason you might see fewer colonies on your LB/Amp/Arabinose + plate (compared to the number of colonies..? The reason you might see fewer colonies on your LB/Amp/Arabinose + plate (compared to the number of colonies that you see on your LB/Amp + plate) is because? a. UV ...
Sunday, October 18, 2009 at 8:28pm

BIOLOGY
1.Three fatty acids form a triglyceride with one glycerol. What similarities would the fatty acids have with polysaccharides? What differences? 2. When you consume more food than you require, the mitochondria in the liver are involved n forming triglycerides from the excess. ...
Sunday, October 18, 2009 at 3:24pm

Biology
How can I make a 3D model of a bone cell?
Sunday, October 18, 2009 at 12:22pm

Biology
Equal sized potatoes are dipped into water,weak sucrose and strong sucrose solution.Predict (a)What potato would increase in size (b)What potato would decrease in size (c)Comment on the stiffness of the potatoes before and after dipping them into the respective solutions. (d)...
Sunday, October 18, 2009 at 4:37am

Biology
What are the roles of the scapula? Are these correct? Aids movement of the shoulder joint Provides support Attachment of collar bone to the humerus
Sunday, October 18, 2009 at 12:33am

science-biology help
knowing that as the steepness of a concentration graident increases, the rate of diffusion increases, explain how a single celled organisms would respond in an oxygen rich pond compared to an oxygen poor pond. I'm not really sure but in an oxygen poor pond there is a small...
Saturday, October 17, 2009 at 8:03pm

Biology
What is the occupational outlook for an agronomist. Are there any job openings for this career, what is the outlook?
Saturday, October 17, 2009 at 4:30pm

biology/biochemistry
Why should we carry the Western blot in the low temperature while we were transferring SDS-PAGE information to the PVDF membrane?
Saturday, October 17, 2009 at 7:13am

biology!
A person has the blood group AB, what determines this blood group? a) different alleles on different chromosomes b) different alleles on the same chromosomes c) the same alleles on different chromosomes d) the same allele on the same chromosomes I thought that the answer ...
Friday, October 16, 2009 at 9:04pm

Biology
Can proteins like GFP slow transcription of other essential cellular proteins?
Friday, October 16, 2009 at 4:34pm

biology
If an elephant's cell were to lose ability to perform aerobic cellular respiration, would would most likely happen? A)the cells would switch over to anaerobic respiration and the elephant would be fine. b)the cells would switch over to lactic acid fermentation and the ...
Friday, October 16, 2009 at 3:04pm

biology
A rock covered with green spots is placed on a screen in a test tube above some bromothymol blue solution; after several hours, the solution remains blue. What can you conclude form this experiment? AFter doing research, I found out that bromothymol solution is a blue liquid ...
Friday, October 16, 2009 at 2:42pm

biology
where in a chloroplast would you find the highest concentration of protons?
Friday, October 16, 2009 at 12:41pm

Biology
In the cyclic reaction sequence called the krebs cycle, which chemical event does not take place? a.The acetyl group is joined with a four carbon molecule, oxaloacetate. b. Two carbons per cycle are made into CO2 molecules. c. Electrons generated are used to produce NADH. d. ...
Thursday, October 15, 2009 at 7:59am

biology
can you explain the differences and similarities between the energy cycles of human cells, plant cells, and yeast cells?
Wednesday, October 14, 2009 at 10:00pm

Biology
A variety of snail has an inherited condition that affects the thickness of the shell. The alleles are t and n. tt have thick shells tn have thin shells nn do not survive Two heterozygous snails are mated. What is the probability that a surviving snail of the next generation ...
Wednesday, October 14, 2009 at 9:59pm

biology!
What is the percentage of oxygen in expired air when a person is resting?
Wednesday, October 14, 2009 at 9:17pm

Biology quick question
Is Taq polymerase an oligodeoxynucleotide?
Tuesday, October 13, 2009 at 8:36pm

Biology
Which of these two molecules is LESS involved in cell communication? Carbohydrates OR Lipids
Monday, October 12, 2009 at 11:37pm

Biology
Which is the most direct way that the carbon in starch stored in cereal grain can be released to the atmosphere as carbon dioxide? 1. grain destroyed by fire 2. grain eaten by birds 3. grain made into bread and eaten by humans 4. grain stored in damp conditions goes mouldy and...
Monday, October 12, 2009 at 10:27pm

Biology!!!!
Which blood vessel contains blood that has high oxygen concentration, low carbon dioxide concentration, and high pressure? 1. aorta 2. pulmonary artery 3. pulmonary vein 4. vena cava I wrote the answer as 3, but is wrong. Which one is the correct answer?
Monday, October 12, 2009 at 10:15pm

Biology!!!
Which method of birth control prevents the implantation of the fertilised egg? 1. coil (mechanical) 2. condom (mechanical) 3. spermicide (chemical) 4. vasectomy (surgical) I don't get the question. The correct answer was number 1, but shouldn't all the options be ...
Monday, October 12, 2009 at 9:51pm

Biology!!
If i do a starch test on a plant cell that comes from a plant exposed to sunlight, which parts of the plant cell will be stained blueblack? 1. nucleus 2. cell wall 3. cytoplasm 4. vacuole I wrote the answer as 4, the vacuole, but the correct answer says 3, the cytoplasm. ...
Monday, October 12, 2009 at 9:44pm

Biology!
Inorganic fertiliser is applied each year to fields bordering a lake. the fertiliser runs off into the lake and causes six changes which altogether make the fish die. 1. aerobic bacteria feed on dead plants 2. algae reproduce faster 3. light cannot penetrate water 4. oxygen ...
Monday, October 12, 2009 at 9:38pm

Biology
In a double-stranded fragment of DNA, which of the base pairs would you expect to be most stable
Monday, October 12, 2009 at 7:08pm

Biology
What is the role of oxygen in aerobic respiration?
Monday, October 12, 2009 at 3:13pm

biology
nitorgen has an atomic number of 7. which of the following elementshave similair chemical proteries? carbon, neon, phosphorus, or sulfer?
Monday, October 12, 2009 at 2:26pm

Biology
The absorbance of a protein solution measured in a 1.0 cm cuvette at 278 nm was 1.145. The protein content of that solution, calculated from quantitative amino acid analysis, was 256 micrograms/mL. Calculate the extinction coefficient of the protein in unitsbof mL/mg/cm. ...
Monday, October 12, 2009 at 2:10pm

Biology
1. A famous scientist once said that wherever in the universe life exists, some of those life-forms must be colored. Why would the scientist make such a statement? 2. One of the accessory pigments used in photosynthesis is beta-carotene, a carotenoid found in high ...
Monday, October 12, 2009 at 12:39pm

Biology!!!
The female mosquito is an effective vector for malaria. What makes it an effective vector? 1. it has wings 2. it lays many eggs 3. it makes noticeable noise 4. it mates several times I wrote the answer as B, but the answer as told on my assessment book says A, (which doesnt ...
Monday, October 12, 2009 at 5:54am

Biology!!
I'd like to know, how many chromosomes are there for humans? (Correct me if i'm wrong) There are altogether 46 chromosomes, (or 23 pairs of chromosomes), which includes a pair of sex chromosomes.
Monday, October 12, 2009 at 5:43am

Biology!
What is the role of bacteria in the making of yoghurt from milk? 1. to make alcohol 2. to make carbon dioxide 3. to make lactic acid 4. to make lactose coagulate I think the answer is number 4, but i'm not so sure.
Monday, October 12, 2009 at 5:30am

biology
why do plants produce far more sugar than they need? why do they not stop photosynthesis once immedaite needs are met?
Sunday, October 11, 2009 at 7:48pm

science
is a news article the same as a news story is this a news article or a news story? Is Garbage The Solution To Tackling Climate Change? ScienceDaily (Oct. 3, 2009) — Converting the rubbish that fills the world’s landfills into biofuel may be the answer to both the ...
Saturday, October 10, 2009 at 3:14pm

Biology
What's the difference between LB "-" and LB "+"?
Friday, October 9, 2009 at 5:01pm

biology
why would someone choose to propagate a particular plant for commercial purposes by using vegetative structures instead of seed?
Thursday, October 8, 2009 at 8:08pm

Biology
Can anyone give me a web site that can give me information for a lab report on observing diffusion? Thanks
Thursday, October 8, 2009 at 12:34pm

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