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July 25, 2014

Homework Help: Science: Biology

Recent Homework Questions About Biology

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biology
What geological process is used to explain how nearly identical animals that cannot swim, are found on continents separated by large oceans? What is the half-life of Uranium 238 and what did we use that radioisotope to date as the oldest item on Earth?
Saturday, April 21, 2012 at 1:29pm

biology
please help me by answering these questions: 1)how many salivary glands are present in our body? 2)what are the names of those salivary glands?
Thursday, April 19, 2012 at 3:19pm

Biology
can anyone help me by defining what is holophytic? please
Thursday, April 19, 2012 at 3:15pm

Biology
A plant's cell wall is made of cellulose fibers. What is the purpose of a plant's cell wall?
Thursday, April 19, 2012 at 1:56pm

biology
how could you set up an experiment to show that the oxygen is coming from the plant and not from the water???
Thursday, April 19, 2012 at 1:11pm

Biology 1010
Which of following is NOT characteristics of all fish? a.gills as respiratory organs b.two-chambered heart c.swim bladder for buoyancy organ d.skin with scales e.presence of jaws
Wednesday, April 18, 2012 at 9:47pm

Binomial Distribution
A biology quiz consists of twelve multiple-choice questions. Eight must be answered correctly to receive a passing grade. If each question has five possible answers, of which only one is correct, what is the probability that a student who guesses at random on each question ...
Wednesday, April 18, 2012 at 8:35pm

College General Biology
A man who is a non-tongue roller (t) marries a woman tongue roller (T) whose father was a non-tongue roller (t) - what would the expected genotype and phenotype percentage for their offspring?
Wednesday, April 18, 2012 at 2:01pm

biology
how can you identify gasses released by plants and animals
Tuesday, April 17, 2012 at 5:10pm

biology
Orange juice is often touted by nutritionists as being an excellent antioxidant. Within an essay response, discuss the following concepts: an antioxidant’s function, free radicals and their effect on the human body, sources of vitamin C, optimal delivery system for ...
Tuesday, April 17, 2012 at 2:07pm

science-biology
I am in 10th grade and can you please help me by defining what is bio-catalysts?
Tuesday, April 17, 2012 at 1:21pm

Biology
GENETICS PRACTICE PROBLEMS Worth 10 points each problem is either right or wrong 1. In humans, assume that brown eyes (B) are dominant over blue eyes (b). A blue eyed man, both of whose parents were brown eyed, marries a brown eyed woman whose father was brown eyed and whose ...
Monday, April 16, 2012 at 10:23pm

genetics/biology
I am having trouble wording this question. Describe the differences in the outcomes for a dihybrid cross ifgenes are: a. completely linked b. completely unlinked c. incompletely linked.
Sunday, April 15, 2012 at 9:50pm

biology
what all do i need to know for GCSE biology my teacher is absolutely rubbish i tried websites but i don't find them helpful thankyou
Sunday, April 15, 2012 at 4:03am

biology
is insomnia the same thing as sleep deprivation. im pretty sure they are different but i just wanted to check. also what in the brain causes insomnia. What parts of the brain create it adn what are the functions?
Saturday, April 14, 2012 at 7:11am

Biology
Having a really hard time following this diagram of the Kreb cycle and I need to answer these questions: 1. Total number of NADH molecules produced for each glucose molecule in the Krebs cycle. A)2 B)4 C)6 D)8 E)10 2. The theoretical yield of ATP from each NADH molecule. A)1 B...
Saturday, April 14, 2012 at 2:59am

biology
What must the systolic blood pressure be valued at for adequate mean arterial pressure if the diastolic pressure is 75? (Assume resting conditions) A. at least 90 B. at least 95 C. at least 100 D. at least 105 E. at least 110 F. at least 115 G. at least 120
Wednesday, April 11, 2012 at 11:02am

biology
Predict the expected change to blood flow should norepi act on arteries of the abdominal cavity? A. Blood flow increases B. Blood flow decreases C. Blood flow stays the same but pressure increases D. Blood flow stays the same but speed decreases E. None of the Above
Wednesday, April 11, 2012 at 11:02am

biology
What part of the brain controls sleep and how does it work. I am looking for a easy to understand answer because when i have searched i do not understand it.
Monday, April 9, 2012 at 2:09pm

biology
why a disease that was once on the decline might re-emerge?
Saturday, April 7, 2012 at 8:31pm

Biology
If agglutination occurs when blood with a certain antigen and blood with the corresponding antibody mix, why is blood type O the universal donor? Wouldn't the A or B antibodies from the O type blood attack the blood antigens of the recipient and cause clotting?
Friday, April 6, 2012 at 6:30pm

biology
1.Describe the pathway of an unfertilized egg as it travels through the female reproductive system
Friday, April 6, 2012 at 9:36am

How get caramel in caramilk bar
my sister have this question for biology how they get caramel into caramilk bar? she think the inject it in there, but she want to know how they do it.
Thursday, April 5, 2012 at 8:17pm

Biology
I'm learning about chromatography and photosynthetic pigments. My question is "how can we measure the light absoptive characteristics for a leaf extract?"
Thursday, April 5, 2012 at 10:58am

biology
why do breathing rates increase in crowded rooms. pls help
Wednesday, April 4, 2012 at 8:13pm

Biology
What does Rf, (or relative to front) mean?
Wednesday, April 4, 2012 at 5:14pm

Biology
If you are looking at a flame burning in a pit, what are the physical and chemical process/changes? Thanks
Tuesday, April 3, 2012 at 12:14pm

Biology
In class, I did an experiment with water and iodine solution in a beaker and also starch in a dialysis tube tied and placed in the beaker. There were discussion questions I couldn't answer surely... please check my answers. 1. a)Use your results to determine the direction ...
Tuesday, April 3, 2012 at 9:00am

biology
Below the human hemoglobin sequence are the first thirty amino acid sequences of several other species’ hemoglobins. Inspect the sequences and answer the following questions: Human) h l t p e e k s a v t a l w g k v n v d e v g g e a l g r l A) ml t a e e k a a v t a f w ...
Sunday, April 1, 2012 at 7:18pm

URGENT Spanish help please.
ok in the example it shows: ¿Comprendes espanol? Si, lo comprende ok for this question it's asking 1) do you and your siblings practice tennis my response: no, no los practicamos.. it said i was wrong how would I correct that 2) it asked does your mother teach ...
Sunday, April 1, 2012 at 4:09pm

biology
I have the fetal pig test on muscles in AP biology class coming up soon. And I was wondering if anyone knows any good online sites where thye give pictures and i can practice labeling the muscles on the pig.. thanks
Sunday, April 1, 2012 at 2:22pm

Biology
I estimated a possum population to be 260. It was later found that the possums rather enjoyed being trapped because of the tasty food used as bait. Does this mean the population estimate may be too high or too low?
Thursday, March 29, 2012 at 8:15am

Biology
Where is the Barnacle zone located in a rock platform ecosystem(Upper littoral, upper mid-littoral, lower mid-littoral or lower littoral zone)?
Thursday, March 29, 2012 at 7:25am

AP Biology
In 1918 a particularly virulent strain of influenza (an RNA virus) wiped out millions of health humans in the prime of their lives. Epidemiologists fear that such a super bug could revisit us in the future. And thus there was quest to find samples of the virus, and make a ...
Wednesday, March 28, 2012 at 8:39pm

Biology
do all specific proteins have the same function in different living organisms?
Wednesday, March 28, 2012 at 6:29pm

biology 2 ap
All living organisms share all of the following features in common except A. carry out metabolism B. transfer energy with ATP C. encode hereditary information in DNA D. are composed of one or more cells E. containing organelles
Wednesday, March 28, 2012 at 8:41am

biology
sir, there was a question in my biology test that required us to draw a graph of concentration of sucrose solution against rate of reaction. so how do I plot the graph? If i follow the question's requirement, i have to put the concentration of sucrose solution as the y-...
Wednesday, March 28, 2012 at 3:30am

biology
sir, there was a question in my biology test that required us to draw a graph of concentration of sucrose solution against rate of reaction. so how do I plot the graph? If i follow the question's requirement, i have to put the concentration of sucrose solution as the y-...
Wednesday, March 28, 2012 at 3:29am

Biology
List two ways bacteria and blue-green bacteria differ. Any help would be appreciated. :)
Tuesday, March 27, 2012 at 11:07am

Biology
What are the risk assessment if you went to a rock platform to compare the abundance of animal populations there?
Tuesday, March 27, 2012 at 2:27am

Biology
The main function of the stomach is to soften the food so that the food can pass through the body quickly. Is this True or False?
Monday, March 26, 2012 at 9:04am

Biology
Suppose that black hamsters were found to be 70% of the population and the gray hamsters 30% of the population. Calculate the percentage of BB, Bb, and bb hamsters in the next generation. - I don't know how to calculate the percentage of the genotypes.
Monday, March 26, 2012 at 12:09am

Biology
When you measure your heart rate for less than 20 seconds , why is it less possible for the results to be reliable? When you measure your heart rate for more than 20 seconds, why is it still less possible for the results to be reliable?
Sunday, March 25, 2012 at 5:03pm

biology
a class of pupils obtained results on a bar chart during a seashore investigation. they sampled the numbers of different seaweeds found in 0.25 m2 from the top shore (upper shore) to lower shore and found average percentage cover for each seaweed. describe how the pupils would...
Sunday, March 25, 2012 at 3:35pm

Biology
If you cross 1 inflated pea pod with a constricted pea pod and all of the offspring turn out inflated,is inflated dominant or recessive?
Saturday, March 24, 2012 at 8:10pm

Biology
What are gametes produced from the humanbody?
Saturday, March 24, 2012 at 8:07pm

Biology
If nonessential amino acids are missing from the diet, can essential amino acids be substituted in the protein? I would appreciate some help with this one-thank you
Saturday, March 24, 2012 at 3:31pm

biology
1. what is the function of the menstrual cycle? 2. Trace the path of a sperm from the male body? 3. Examine the two small lungs found on either side of the heart? Describe their size and function?
Friday, March 23, 2012 at 9:56pm

biology
Name a covalent bond of amylose that can become hydrolyzed? Name a cvalent bond of Casein that can become hydrolyzed?
Thursday, March 22, 2012 at 9:47pm

biology
if i have 1 litter of a 1M solution of HCI, how many grams of NaOH must i add to neutralize the solution and adjust the ph to 7
Thursday, March 22, 2012 at 10:00am

biology
Food that is consumed often enters the body in the form of large organic molecules, such as proteins and starches. Prior to entering cells, however, these large molecules must be broken down into smaller molecules. For example, proteins are digested into _______ prior to ...
Wednesday, March 21, 2012 at 10:28pm

biology
Organisms must be able to adapt to a changing external and internal environment. An organism's ability to maintain a stable internal environment is known as homeostasis. How does a cell's membrane help an organism maintain homeostasis? A. Cell membranes use a large ...
Wednesday, March 21, 2012 at 10:19pm

Biology
List 3 features of catalysts.
Wednesday, March 21, 2012 at 10:11pm

biology
what is the different between diet and health.
Tuesday, March 20, 2012 at 8:26pm

biology
Traits like human height and skin color shows a wide range of phenotypes, as opposed to just two ot three. From the standpoints of genese and alleles, explain why is this so.
Monday, March 19, 2012 at 6:00pm

biology
do reduced or oxidized forms of carbon carry more energy?
Monday, March 19, 2012 at 2:30am

biology
Why are seeds considered a more effective means of reproduction than spores in a dry environment?
Monday, March 19, 2012 at 12:31am

Biology
The problems of survival of animals on land are very different from those of survivial of animals in an aquatic environment. Describe four problems associated with animal survival in terrestrial environments but not in aquatic environments. For each problem, explain an ...
Sunday, March 18, 2012 at 8:45pm

Biology
What is the role of promoter in lac operon?
Saturday, March 17, 2012 at 2:50pm

Biology
What results would you expect if KOH or NaOH were omitted in the Benedict's test? Why?
Wednesday, March 14, 2012 at 3:12pm

Biology
Among humans, increased interest in food intake normally occurs _____. only after the production of glucose in the liver can no longer meet metabolic needs when fewer calories are taken in than are expended, but only after the body depletes its reserves of fat in the liver via...
Wednesday, March 14, 2012 at 3:07pm

Biology
Music Video Project Biology? Hey! So I am doing a music video project for AP Biology, and my topic is Gene Regulation. I want to know what should be the most important things I should include in my song, and what song I should use (80's/90's/Current) to parody for this...
Wednesday, March 14, 2012 at 11:40am

biology
explain how the hiv virus destroys the immune system.
Tuesday, March 13, 2012 at 9:28pm

Music Video Project
Hey guys! I am in a bit of a dilemma. I am doing a music video project for my AP Biology class and My topic is GENE REGULATION! I have no clue what to sing for it. What could be a good chorus? hook? What should be the most important to include in my song about the topic? Thanks!
Tuesday, March 13, 2012 at 12:50pm

biology
Susan needs to measure and heat the chemical she wants to use in an experiment with a graduated cylinder. Which graduated cylinder is suitable for use?
Tuesday, March 13, 2012 at 11:22am

biology
I have 2 problems/questions I am unsure of the answers. 1. how would you demonstrate the Valsalve maneuver using the model lung? 2. If a woman is breathing rapidly and deeply after exercise, would TLC, RV, TV, IRV, and ERV stay the same, increase or decrease? Thank you for any...
Tuesday, March 13, 2012 at 9:34am

biology
what are the advantages for using nanotechnology?
Monday, March 12, 2012 at 9:53pm

biology
how can nanobots be used to fight the common cold?
Monday, March 12, 2012 at 5:26pm

biology
briefly describe the basic characteristics that all living things on earth have in common
Monday, March 12, 2012 at 5:18pm

Biology Question
I have 2 problems/questions I am unsure of the answers. The first one is "how would you demonstrate the Valsalve maneuver using the model lung?" and 2. If a woman is breathing rapidly and deeply after exercise, would TLC, RV, TV, IRV, and ERV stay the same, increase...
Sunday, March 11, 2012 at 9:02pm

Biology
can anyone send me a website link to a Monocot and Dicot Leaf and Stem cells under a microscope? (not cross section) Also, do they both have a cell nucleus?
Sunday, March 11, 2012 at 4:04pm

Biology
Why does the pCO2 value increase during hypoventilation? If hypoventilation causes shortness of breath, would that not increase the CO2 concentration, therefore decreasing pCO2? What am I understanding incorrectly?
Sunday, March 11, 2012 at 12:51pm

biology
If you have the option to save from extinction either the carnivores oor the primary produccers in an ecosystem which whould you protect? why
Sunday, March 11, 2012 at 12:30pm

biology
If you have the option to save from extinction either the carnivores oor the primary produccers in an ecosystem which whould you protect? why
Sunday, March 11, 2012 at 12:30pm

biology
A medical microbiological lab report indicates that a sample contained a biofilm, and that one species in the biofilm was identified as Neisseria gonorrhoeae. Is this strain of Neisseria likely to be pathogenic? Why and why not?
Sunday, March 11, 2012 at 3:37am

biology:plz someone help
The heart lung machine is used so that surgeons can operate on the arteries supplying heart muscle. These arteries may be diseased. (a) Name these arteries and explain how they may become diseased. (b) suggest why a patient is put on a heart lung machine during such an ...
Saturday, March 10, 2012 at 9:40am

biology
can toads are considered a pest in australia are there anyways that they can adapt to their surroundings without the food chain being damaged
Saturday, March 10, 2012 at 8:03am

biology:plz help
state the name for the action of two oppposing miscles, such as the biceps and the triceps.
Saturday, March 10, 2012 at 6:04am

biology
Why is a denaturing solution used in the Southern blotting technique?
Friday, March 9, 2012 at 1:21pm

Biology
H+Hb --> HHb HHb --> H+Hb which process is internal respiration and which process is external respiration???
Friday, March 9, 2012 at 7:35am

biology
humans have a double circulation system. there is a low pressure circulation and a high pressure circulation. (a) explain how the structure of the heart enables it to pump blood into two circulations at different pressures
Friday, March 9, 2012 at 6:24am

biology
The heart lung machine is used so that surgeons can oprate on the arteries supplying heart muscle.the arteries may be diseased. (a) Name these arteries and explain how they may become diseased (b) suggest why a patient is put on a heart lung machine during such an operation.
Friday, March 9, 2012 at 5:55am

biology
The heart lung machine is used so that surgeons can operate on the arteries supplying heart muscle. These arteries may be diseased. (a) Name these arteries and explain how they may become diseased. (b) suggest why a patient is put on a heart lung machine during such an ...
Friday, March 9, 2012 at 5:52am

Biology
Help please! Do organic fertilizer products (in bags or sacks) decay after some time? If yes, how long will it take to decay?
Thursday, March 8, 2012 at 10:06pm

Biology
for my sister again. what be 2 examples of short wave radiation that can trigger mutation. she only found uv radiation.
Thursday, March 8, 2012 at 8:15pm

Biology
What is the difference between Curing, Composting and Fermentation?
Thursday, March 8, 2012 at 7:49pm

Biology
i asking question for my sister again how r gene combina tions reshufled? my sister and i find this paragraph online but we not able to get answer. Sex can introduce new gene combinations into a population and is an important source of genetic variation. You probably know from...
Thursday, March 8, 2012 at 7:40pm

Biology
Is Carbon (in soil) bad for plants?
Thursday, March 8, 2012 at 7:37pm

biology
If short hair (L) is dominant to long hair (l), then to determine the genotype of a short-haired animal it should be crossed with Answer a. Ll b. ll c. LL d. All of the above. e. None of the above.
Thursday, March 8, 2012 at 5:15pm

Biology
As a nurse in a hospital, your observe that certain kinds of pain may be allievated by mere offering of a drug, potent or not. To test this hypothesis, two pain drugs and placebo randomly adminstered to patients following surgery. Time is recorded in hours until patient ...
Wednesday, March 7, 2012 at 9:02pm

Biology
Explain how skin, bones and muscles are related to each other and Why is this relationship important to the understanding of the skeletal and muscular systems?
Tuesday, March 6, 2012 at 11:08pm

Biology
Which of the following would be the most sigificant between mitosis and meiosis? A. Chromosomes are duplicated before mitosis B. Meiosis is not followed by cytokinesis C. Homologous Pairs of chromosomes are split up in meiosis. D. Crossing over occurs in mitosis. So far i got ...
Tuesday, March 6, 2012 at 3:04am

Biology Science
Arrange the following in correct order in food chain- Fish,Plankton,Shark,Crab
Monday, March 5, 2012 at 1:47am

biology
Question 18 If a child was allergic to a substance scratched onto their skin, the area turned red and swollen within about 10 minutes. Which of the following would cause these symptoms? Answer Release of interleukin-10 Recruitment of B cells Release of histamine The presence ...
Sunday, March 4, 2012 at 11:36pm

biology
If a child was allergic to a substance scratched onto their skin, the area turned red and swollen within about 10 minutes. Which of the following would cause these symptoms?
Sunday, March 4, 2012 at 10:52pm

Biology multiple choice question
If a randomly-mating population has an established frequency of 64% for the organisms homozygous dominant for a given trait, what is the frequency of this dominant allele in the gene pool? A. .2 B. .24 C. .36 D. .8 E. .64 I think the answer is D. .8
Sunday, March 4, 2012 at 9:27pm

Biology
I'm confused on the rule of multiplication and the rule of addition. When do I use each to determine the probability of a genetic trait being inherited.
Sunday, March 4, 2012 at 8:58pm

Biology
Individuals whose characteristics are well-suited to their environment survive. Individuals whose characteristics ar not well-suited to their environment either die or leave fewer offspring. This principle Darwin called survival of the fittest. how i rewrite this definition in...
Sunday, March 4, 2012 at 8:17pm

Biology
two negative effect of direct artificial selection?
Sunday, March 4, 2012 at 7:29pm

Biology
my sister still be sick so i still helping her post questions. i write paragraph from her textbook that go with question. Ultimately, Darwin recognized in nature a process that operates in a manner similar to the way artifical selection worked on farms and in fields. Darwin ...
Sunday, March 4, 2012 at 12:20pm

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