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Homework Help: Science: Biology

Recent Homework Questions About Biology

biology
Which photosystem-1 or 2-most likely evolved first?

biology
Small gene big plasmid Question 2 Part E wrong. Question 2 Part F Determine the DNA sequence of PCR products. I do not understand how to handle this problem. On home works they were wrong and the solutions were confusing. Please give me a clue.

biology
ou sequence many of the recombinant plasmids generated. You find three mutant versions of the inserted gene. (This is likely due to errors introduced during the PCR amplification.) The sequences of the gene found in the three mutants are given below. Consider each of the ...

A/P Biology
The Echinopsis mamillosa is a flowering cactus native to Bolivia. A high-rise building is built near a particular Echinopsis, filtering the amount of direct sunlight it receives. Which of the following processes is negatively affected first by the reduction in sunlight? ...

Science! Biology 1
Question: Which of following best describes the free-energy requirements of an organism? Answer Choices: During times of hibernation large amounts of free energy are required. Free-energy demand is consistent for all heterotrophs. The organism requires free energy in all ...

biology
Given three restriction enzymes, cuts and base pairs on the plasmid map. How do you apply this information to a autoradiogram of sequencing gel? Also, include the band locations.

biology
can you give examples of analogous structures????? please i have tried about 4 differet websites and no one has helped

Biology ! Please help!
Why do chromosomes form and what kind of proteins do they combine with?

biology
polar molecule are soluble in water. how does this activity demonstrate polarity of molecule that contain the -OH group. our activity was to do an experiment mixing 2 diff liquids together to see if they dissolve and tell if its polar or nonpolar. 1. water and oil= polar 2. ...

Biology
In DNA fingerprinting, the DNA probe that is used is ______to the DNA sequence of the repeats in the sample? im guessing amplify????

Biology
Please help! i was wondering why a genome size determined in a lab would be smaller than that of the actual. thanks

Biology
How are antibodies used to detect similarities in protein sequences?

Biology
why do we use protein sequences when comparing genetic similarities?

biology
Is their a relationship between strength and independent mobility? Can a spinal cord injury affect he body permanently?

Biology
What are the inputs and outputs of the proton pump?

BIOLOGY
Consider the following 45 base-pair (bp) DNA sequence: 1 10 20 30 40 | . | . | . | . | . 5’-CGCACCTGTGTTGATCACCTAGCCGATCCACGGTG​GATCCAAGGC-3’ ||||||||||||||||||||||||||||||||||||||||​||||| 3’-GCGTGGACACAACTAGTGGATCGGCTAGGTGCCAC​CTAGGTTCCG-5’ You also ...

Biology
How would u expect the number of mitochondria in a cell to be related to the amount of active transport it carries out? Please help!

biology
many human-caused losses of biodiversity, such as habitat destruction and of invasive species. are there any natural events that could alter the diversity index?

Biology!!!
In humans, short fingers and widow's peak are dominant over long fingers and straight hairline. A heterozygote in both regards reproduces with a similar heterozygote in both regards reproduces with a similar heterozygote. What is the chance of any one child having the ...

Biology
What polymers are found commonly in cells? Additionally, what monomers make up those polymers?

biology
Enzymes in the human body work in a very wide range of conditions. A. True B. False

biology
Substance X is converted to substance Y in a chemical reaction. What role would a catalyst play in this scenario? A. It would increase the solubility of substance X into the solvent needed to speed up the reaction. B. It would speed up the reaction by becoming part of the ...

biology
an experiment, a scientist notices that an enzyme’s catalytic rate decreases when the pH of the environment is changed. Which of the following best summarizes the effect of pH on the enzyme? A. pH changes the shape of the enzyme. B. pH takes energy away from the enzyme, thus...

biology
if there is no oxygen for the glycolysis what process would that be called?

biology
Sulfur has six electrons in its outer most energy level. In ionic bonding, it would tend to ­­­­­­­­­______________________​_______. A. take on two more electrons B. give away two electrons C. give away six electrons D. not take on anymore electrons

biology
Which of the following involve electronic charges? A. hydrogen bonds B. ionic bonds C. polar molecules D. all of the above

biology
Which of the following involve electronic charges? A. hydrogen bonds B. ionic bonds C. polar molecules D. all of the above

biology
Sulfur has six electrons in its outer most energy level. In ionic bonding, it would tend to ­­­­­­­­­______________________​_______. A. take on two more electrons B. give away two electrons C. give away six electrons D. not take on anymore electrons

biology
Why is it good for plants on the forest floor to have larger leaves but could be harmful to the trees above?

psy/340
I need help answering this question please. Discuss the influences of biology and the environment on sexual differentiation.

Biology ms. sue
ms. sue can you give me link to some pictures it says give description of the species including both sexes and their younger life stages for animals include images.

Biology
How do Eukaryotes package their gene products?

Biology
"Quiglilies" are a rare variety of flower. They have one allele for orange petal colour O. They also have another allele for white petals W. These alleles have a co-dominant relationship producing a yellow petal colour. i) what are the possible genotypes and phenotypes present...

Biology
The production of a polypeptide involves the correct sequencing of amino acids, originally encoded by a segment of DNA. This code is transcribed onto mRNA and subsequently translated using tRNA. From the following DNA segment, record the base sequence that would be encoded on ...

Biology
What could be a benefit for a plant that can switch between cyclic and non-cyclic electron transport? Think about the products of electron transport and what products are needed for the Calvin Cycle.

Biology
How are bryophytes similar to green algae? How are they different?

Biology
What information does relative dating provide?

biology
if DNA replication were conservative, what sort of bands would you expect from the CsCl density gradient centrifugation?

biology
what is one example of a specific case used by scientists for organ cloning?? (therapeutic cloning)

Biology 20
I'm using chromatography to identify compounds in a leaf extract for a lab, and one of the evaluation questions is 'Suggest a step that could be added to the procedure to isolate a specific compound for chemical testing.' What step could I use?

biology
If a person with Down syndrome marries a person without Down syndrome, is it possible for their child not to have Down syndrome? I assume that there is a 50% chance that they could have a child that will not have down syndrome. Is this correct?

grade 11 biology
Consider a germ cell of a person with Down syndrome(Trisomy 21). Explain what is happening with the arrangement of chromosome 21 inside the cell during interphase 1, Anaphase 1, Telophase 1, telophase 11. Please help, I am really stuck on this. Thank you

Biology
If the axo-membrane becomes more permeable to potassium Ions. What would happen?

Biology
How does having a large, sweet fruit benefit a plant?

biology
Imagine that you collected your data above, threw away the gel, and re-ran PCR again on the same samples, but using a different set of primers. How will the 2nd gel differ from the first since you're using a different set of primers?

Biology
Imagine that you collected your data above, threw away the gel, and re-ran PCR again on the same samples, but using a different set of primers. How will the 2nd gel differ from the first since you're using a different set of primers?

biology
The primary structure of proteins is often described as "amino acids connected like beads on a string". In this same vein, which of the following images best describes a protein's quaternary structure?

Biology
What would happen if you ran the same sample of DNA as your first experiment but used different primers?

Biology
organelles with an abundance of carotenoids but no chlorophyll

Biology
I do not understand what visible and sharp focus mean. The instruction says.... When viewing the crossed hairs and the top hair is in sharp focus, is the other hair visible or in sharp focus at the following total magnification...?

Biology
I do not understand what visible and sharp focus mean. The instruction says.... When viewing the crossed hairs and the top hair is in sharp focus, is the other hair visible or in sharp focus at the following total magnification...?

Biology
organelles with an abundance of carotenoids but no chlorophyll

biology
Covalent bonds are not affected by chemical reactions. true ir false

biology
What are the reactants in the following chemical formula? C6H12O6 + 6O2 ¨ 6CO2 + 6H2O

Biology
What happens when a substance dissolves in the watery solution outside of a cell and equilibrium is disrupted. a. Water from the cell will move into the solution b. water from the solution will move into the cell c. the pores in the cell membrane will become clogged with the ...

Biology
Could someone please explain Endocytosis(phagocytosis, pinocytosis and receptor-mediated endocytosis) in simplest way? I do not understand

Biology 101
1. Which of the following statements is incorrect about homologous chromosomes? a. Homologous chromosomes are similar but not identical b. Homologous chromosomes have the same size and function c. Homologous chromosomes contain genes for the same kind of protein products d. ...

biology
4. Using sunscreen and consuming energy drinks involve _____________________. A. using biological information to make informed decisions B. risks to using biotechnology C. using genomics to make informed decisions D. all of the above

biology
A sheep with human genes spliced into it to produce human antibodies is an example of a(n)

Biology
PLEASE CONSIDER EACH OF THE FOLLOWING CHANGES SEPARATELY. Be sure to enter the sequence using the 3-letter abbreviations (for example, Ala-Gly-Ser), where the left most amino acid of your answer represents the first amino acid of the polypeptide. Another way to say this is: be...

biology
Is carbonic acid (H2CO3) organic or inorganic molecule?

biology
Is carbonic acid (H2CO3) organic or inorganic?

math
the biology class has a lab every days. the earth science class has a lab every three days . which class day do they both have class ?

Biology
Your thermocycler is broken, and can only reach a temperature of 72 degrees Celsius maximum. What effect will this have on your PRC? Will you still get DNA replicated? Explain

Biology
Why wasn't PCR possible until Taq polymerase was discovered?

Biology
In mitosis, if a cell has 4 chromosomes in prophase, how many chromosomes will this cell have in metaphase? a. 64 b. 32 c. 16 d. 8 e. 4 If a cell has 20 chromosomes in G1, how many chromatids will be present during prophase? a. 30 b. 20 c. 5 d. 40 Which of the following ...

biology (Help please!!!)
1. If a student pours a solution of salt water on an elodea leaf, what is it an example of? 2.A child pours salt crystals on the body of a slug he finds in the backyard. Options are: high concentration, low concentration, osmosis, diffusion, hypertonic solution, and hypotonic ...

Biology
Which of the following cells check for during the G2 check point? a. Growth hormone c. DNA integrity b. Nutritional status d. Cell size In mitosis, if a cell has 4 chromosomes in prophase, how many chromosomes will this cell have in metaphase? a. 64 b. 32 c. 16 d. 8 e. 4 The X...

Biology
single celled prokaryotes like the bacteria and archaea are the dominant and most diversified groups of living forms today. does this support their ancient origins? Explain

Biology
I am having a really hard time understanding respiration and photosynthesis. Is there a simple explanation for both processes?

biology
Stuck on this question. When infected by the Hepatitis B virus (HBV), many patients experience flu-like symptoms such as fever, loss of appetite, nausea, vomiting, and malaise. This is called acute hepatitis. During this stage, what is the HBV doing? What do you call this ...

biology need help
3 factors the could produce bias in an experiment

Biology/Chem
Soy sauce is prepared by fermenting a salted mixture of soybeans and wheat with several microorganisms including yeast over a period of 8-10 months. After the solids are removed, the resulting sauce is rich in lactic acid and ethanol. How aere these 2 compounds produced? In ...

need help biology
3 factors the could produce bias in an experiment

biology
3 factors the could produce rats

biology need help
Which variable does the scientists or you deliberately change? Dependent, Independent, control is is independent Which variable does the scientists measure? Dependent, Independent, control is it dependent 6. Which variable remains the same/constant throughout the experiment? ...

biology
Which variable does the scientists or you deliberately change? Dependent, Independent, control is is independent Which variable does the scientists measure? Dependent, Independent, control is it dependent 6. Which variable remains the same/constant throughout the experiment? ...

biology
Hi there, Not sure the answer for this question. In what way is endospores stronger than bacterial cell?

biology
Evidence suggests that bacteria supplied with a cup of sugar could run a 60-watt light bulb for 17 hours. What would a scientist need to do to be able to affirm this scientific idea? is it to conduct an experiment to test the hypothesis

biology
What is the sequence of the stop codon?

biology
Evidence suggests that bacteria supplied with a cup of sugar could run a 60-watt light bulb for 17 hours. What would a scientist need to do to be able to affirm this scientific idea? is it to conduct an experiment to test the hypothesis

cor biology
Substance X has a molar extinction coefficient (E) of 4725 l.mol-1. How many moles of X are needed to produce an absorbance of 1.0 in a 1 ml cuvette?

Biology
The lack of nutrients and molecular building blocks, cells not secreteing materials normally and improper ion balance are results of which organelle not functioning properly

Biology
What role do vesicles play in processing the proteins in the Golgi Apparatus? a. They create the proteins.(No) b. They modify the proteins. (No) c. They store the proteins. (Maybe) d.They transport the proteins. (Maybe)

Biology
What role do vesicles play in processing the proteins in the Golgi Apparatus? a. They create the proteins.(No) b. They modify the proteins. (No) c. They store the proteins. (Maybe) d.They transport the proteins. (Maybe)

biology
The frequency of carriers of this disease is 0.02 in a particular population. Consider many couples like 6 and 7 where one parent is affected and the other is unaffected. On average, what is the chance that the first child of these couples will be affected? Please give a ...

Biology
Father has red/green color blindness and is a hemophiliac. Mother is normal. Have two female children (Both are probably carriers). One female offspring marries a normal male. The question is what is the probability that their son is both color blind and hemophiliac? ...

biology 2
The digestive, circulatory, respiratory, immune, and excretory systems all work together to maintain homeostasis. Discuss how a minor malfunction in one of these systems could lead to major malfunctions in others. If methods were developed to improve the efficiency and ...

biology
How does acetocarmine affect chromosomes? We use acetocarmine to stain chromosomes, it gives red color to the chromosomes but HOW can it stain them? How does it color them out of all organelles?

biology
movement of water molecules across the cell membranes from hypertonic to hypotonic solution . whether it is osmosis or diffusion?. please clarify.

biology
is trypsin inhibitor competitive or noncompetitive

Biology of Environment
Im having hard time differentiating b/w inductive and deductive reasoning. In inductive you find patterns, then you reach conclusion, in deductive you reach conclusion based on previous known facts, but i still not quite understand. I also not get the top-down, bottom-up.

Biology of environment
What does dynamic equlibrium population growth mean?

Biology
If a person has a herniated disk, sometime surgery can relive the pain that is associated with the condition. One side effect can be a loss of spinal flexibility. Why does this occur?

Biology
If a person has a herniated disk, sometime surgery can relive the pain that is associated with the condition. One side effect can be a loss of spinal flexibility. Why does this occur?

Biology
After adolescence, bones stop growing longer. They do however continue to grow. How do bones remodel and undergo repair

Biology
You wish to produce a human enzyme, protein A, by introducing its gene into bacteria. The genetically engineered bacteria make large amounts of protein A, but it is in the form of an insoluble aggregate with no enzymatic activity. Which of the following procedures might help ...

biology
Which of the following statements is true? 1.Both unicellular and multicellular organisms are at risk of having too much water entering their cells if they are exposed to water containing no salts. 2.Only multicellular organisms have structures that enable them to regulate ...

biology help plz?????????????????
Please tell me which one is TRUE or FALSE for the statements below: 1. During the cardiac cycle the pressure in the left ventricle and right ventricle are approximately equal. 2. During isovolumetric contraction the left ventricular pressure continues to increase and ...

biology help?
Please tell me which one is TRUE or FALSE for the statements below: 1. During the cardiac cycle the pressure in the left ventricle and right ventricle are approximately equal. 2. During isovolumetric contraction the left ventricular pressure continues to increase and ...

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