Homework Help: Science: Biology

Recent Homework Questions About Biology

biology
Which of the following is true of skeletal muscle? A. Contraction of skeletal muscle can alter blood flow through the heart. B. Skeletal muscle contraction produces movements of the body. C. Skeletal muscles pump blood throughout the body. D. Flexion of a skeletal muscle ...

Biology
Could you potentially use up all of your memory B and T cells for a specific antigen and become susceptible to that antigen again?

Biology, Chemistry
I know how to carry out an absorption spectrum I just need help on how to to prepare my test tubes and what to put in then. I am very confused and any help would be greatly appreciated. THANKS ! You will be given a sample containing an unknown concentration of protein (Bovine ...

biology
How does the plant regulate what is able to enter into the stem of the plant? Does it have something to do with the casparian strip?

biology/science
What are the biological terms for the following 1.process in biotechnology that is used to make human insulin in a bacterial cell 2.white blood cells produce antibodies in response to pathogens

biology
(purple smooth = 75, white smooth = 28, purple wrinkled = 24, white wrinkled = 8) Account for the difference between the expected and experimental values.

biology
What is the role that sensors play in the maintenance of homeostasis in the human body?

Biology
What are two roles restriction enzymes play in transformation

Biology HELP
How do you know whether something is homozygous dominant or heterozygous dominant?

Biology
Assume you had a round seed garden pea plant and you wanted to find out whether the round seed plant was homozygous or heterozygous. What would you do? (Round is dominant to wrinkled seed)

biology
I have to write an essay on about why organ donation should be mandatory in Canada. I need help thinking of arguments. Some that I have thought of are: 1. there is a shortage of organs for transplants 2. it improves the life of the recipient 3. After death organs can be of use...

biology
What is relative dating?

biology
EVOLUTION (fill in the blanks) Natural selection is the BLANK for evolution As a result of natural selection, organisms with more BLANK traits are more likely to BLANK, BLANK, and BLANK on the favorable traits to their offspring. These traits are passed on from generation to ...

biology (fill in the blanks)
Big picture of natural selection/ keep in mind… Natural selection doesn’t move in a BLANK BLANK Natural selection is not a BLANK process Natural selection isn't BLANK; Its all relative to the BLANK. Its from a study form. These are the ones I don't know.

biology
Economists were thinking that if the human population grew unchecked, there wouldn’t be enough living space and food for everyone. What was Malthus’ conclusions?

biology
‘Biologists’ suggested that organisms have been around for a long time and can change too. What was Larmarck’s conclusions?

Biology
8) Describe the difference between a prosthetic group, cofactor, and coenzyme; provide an example of each.

Biology
The metabolic pathways of organism living today evolved over a long period of time- undoubtedly in a step wise fashion because of their complexity. Considering everything you have learned to date about the evolution of life on Earth, put the following in the order in which ...

Biology
Pick the correct answer, and explain why it is correct. If the pressure in the thoracic cavity increases and the pressure in the ventricles due to venous return remains the same, A. Stroke volume will decrease B. heart rate will decrease C. Cardiac output will increase D. ...

biology/evolution
many of the orchids alive today have nectar that doesn't have any sugar in it. Why are there presently-living orchids whose nectar lacks sugar?

Biology
What does b-mercaptoethanol do to secretory proteins?If you forgot to add b-mercaptoethanol to a secretory protein, would the protein's migration likely speed up or slow down? Why?

Biology
What is the phenotype ratio for TTyy X TtYy? Is it 8:8 for tall + yellow to tall + green?

Biology
For each of the following characteristics, will the migration of the protein speed up, slow down, or remain unchanged if you do not add SDS? a)increase molecular weight of protein b) increase concentration of acrylamide c)decrease charge on protein d) increase surface area of ...

Biology
What does b-mercaptoethanol do to secretory proteins?If you forgot to add b-mercaptoethanol to a secretory protein, would the protein's migration likely speed up or slow down? Why?

Biology
In anaphase of mitosis, the sister chromatids are separated and pulled to the poles. How do these chromatids, which are only half of a duplicated chromosome, become chromosomes? As I understand it, mitosis produces daughter cells that are identical to the parent cells.

Biology
What does b-mercaptoethanol do to secretory proteins?also...If you forgot to add b-mercaptoethanol to a secretory protein, would the protein's migration likely speed up or slow down? Why?

Biology
3) For each of the following characteristics, will the migration of the protein speed up, slow down, or remain unchanged if you do not add SDS? a)increase molecular weight of protein b) increase concentration of acrylamide c)decrease charge on protein d) increase surface area ...

Biology
What does b-mercaptoethanol do to secretory proteins?also...If you forgot to add b-mercaptoethanol to a secretory protein, would the protein's migration likely speed up or slow down? Why?

Biology
3) For each of the following characteristics, will the migration of the protein speed up, slow down, or remain unchanged if you do not add SDS? a)increase molecular weight of protein b) increase concentration of acrylamide c)decrease charge on protein d) increase surface area ...

Biology
I need some help with these questions. I've chosen answers, but I want to make sure if they are correct. 1)Which of the following is an acidic pH? 6 7 8 800 A: 6 None of the above ------------------------------------- 2) Which of the following is directly produced by ...

Biology
What does b-mercaptoethanol do to secretory proteins?

Biology
3) For each of the following characteristics, will the migration of the protein speed up, slow down, or remain unchanged if you do not add SDS? a)increase molecular weight of protein b) increase concentration of acrylamide c)decrease charge on protein d) increase surface area ...

biology
it is not known if a tall pea plant is homozygous or heterozygous (a hybrid). you decide to do a test cross to find out. if there are 40 offspring and 7 out of them are short, what is the genotype of the unknown pea plant? draw a punnett square that represents this cross. ...

biology/ chemistry
how do electrolytes affect the formation of micelles?

biology
Hello, I am having trouble with a question on my homework. Even after reading through my notes and textbook I am still not sure what the answer is. I think the answer is the new paramecium is able to reproduce sexually and asexually.Here is the question: After sexual ...

biology
Hi, This is a question on my biology test review that I don't understand. I think the answer is pine trees, but I'm not really sure. Please help! In a barren terrestrial habitat, which of the following would be an example of a pioneer organism? moss pine trees segemented worms...

biology
how do you calculate dna base pair percentages

biology
if a fruit fly has 28.8% Adenine, approximately how much guanine will it have? can someone explain this

Biology 12
The question is asking to calculate the overall energy change in the combustion of ethane (C2H6). This is what I have done: The balanced equation: C2H6 + 6 O2 --> 2 CO2 + 3 H2O (6) 411 + 346 + (6) 494 --> (2) 799 + (3) 459 2466 + 346 + 2964 --> 1598 + 1377 = 5776 = ...

Biology
Are the p1 and p2 generations pure breeding?

Biology
Would an atom of silicon form an ionic bond with an atom of helium? Why or Why not?

biology
Assuming logistic growth, if I told you there are currently 100 quail on campus, with r=0.1, but that they have greatly exceeded their carrying capacity = K = 50. How many quail will be in the population next generation I don't remember how K factors in

Biology Ms sue
1.which of the following is a renewable resource? (A.wind) B.fossil fuels C.minerals D.land 2.The goal of -----is to use cells and tissues to treat human illnesses or injuries. A.clone (B.therapeutic cloning) C.reproductive D.gene therapy

Biology
1.Which of the following is a renewable resource? A.wind B.fossil fuel C.minerals (D.land) 2.The goal of -------is to use cells and tissues to treat human illnesses or injuries. A.clone therapy B.therapeutic cloning (C.reproductive cloning ) D.gene therapy

Biology
When talking about Mendel's experiments, can the Parent (P) generation also be called P1?

biology
Pls how can i itemize the blood cells in litres

biology
Hello, I got this question wrong on a homework assignment and I still can't find the correct answer. The reduction of the chromosome number during meiosis is most important for: 1: keeping the amount of DNA in the cell at a minimum level. 2: allowing the growth of the cell ...

biology
hi, I am studying for an exam and I am trying to really understand the processes of things. So, in a cardiac muscle (everything else normal) what would happen if sympathetic stimulation does not lead to the phosphorylation of Troponin-I? I am asking specifically in regards to ...

Biology
Which of the following situations best shows Darwin’s theory of natural selection as a mechanism for evolution? A. The long neck of a giraffe is the result of its ancestor continually reaching for higher branches. B. The ancestor of the snake had its legs bitten off by a ...

Biology
In fruit flies, eyes can be either white or red, and wings can be either long or short. A mating cross between a red-eyed long-winged female and a red-eyed short-winged male produces the following offpsring: 42 red, short 30 red, long 14 white, short 10 white, long Calculate ...

Biology
Do you think that the countries producing sulfur dioxide emissions should compensate their neighbors for the damage being done?

Biology - Genetics
What is the expected genotypes and phenotypes of F1 flies in the cross between virgin brown eyed female with scarlet males (genes for brown and scarlet eyes are on different autosomes)? I know that brown eyes and scarlet eyes are both recessive but I'm not sure what he ...

biology
what is one advantage of using e. coli to study bacterial growth rates?

biology
A pepper plant is heterozygous for a mutant allele of the gene encoding the CaSGR enzyme (one allele is wild type and the other is mutant). The mutant allele differs from the wild type one in that it lacks a large part of the promoter sequence. Predict the following & briefly ...

Genetics biology
A man and his wife both have normal vision, but a daughter who has color blindness can the man sue his wife for infidelity? show the cross help me please, have been lots of people saying no and yes to this

Biology
need help quickly please If barred pattern on chicken wings is a sex linked trait, set up a cross (hen and rooster), in which they the newly hatched chicks can be determined as male or female based on the barred pattern. and Color Blindness is inherited as a sex linked ...

biology
A pepper plant is heterozygous for a mutant allele of the gene encoding the CaSGR enzyme (one allele is wild type and the other is mutant). The mutant allele differs from the wild type one in that it lacks a large part of the promoter sequence. Predict the following & briefly ...

Biology
describe how a population is thought to evolve through natural selection. Provide an example (specifically, the peppered moth)

Biology
Which of the following solutions bathing a red blood cell would be considered isotonic? Which of the following solutions bathing a red blood cell would be considered isotonic? a solution containing 300 mM NaCl a solution containing 150 mM glucose a solution containing 400 mOsm...

Biology
explain the consequence of x chromosome inactivation in terms of the proteins encoded by the x chromosome genes?

Biology
Color Blindness is inherited as a sex linked recessive. If a color blind woman marries a man with normal vision, what would you expect in their children? Show a cross I put that X- x- Xx x-

biology
What does it mean when pea plants are described as being true breeding?

Biology
explain the consequence of x chromosome inactivation in terms of the proteins encoded by the x chromosome genes?

Biology
What happens as a result of insertion (the mutation)?

biology
I need help on the following: Imagine that a motor unit, with its nerve intact, is placed in a solution that is calcium-free (but has the proper ionic strength – don’t worry how). Further imagine that the ends of the muscle fibers in the motor unit are held such that ...

Biology - Genetics
If genes a, b, c, and d are genetically linked to each other, does it follow that a recombination experiment would detect genetic linkage between a and d?

biology
Through which are the chromosomes, transmitted according to the path of transmission of factors from the parental generation to offspring's as indicated by Mendle?option are as follows (1) hereditary chapters (2) evolution (3) heredity (4) gametes

biology
How many water molecules would be produced from the dehydration reactions associated with making a protein that has a primary structure consisting of 378 amino acids, and that has a quaternary structure consisting of 2 identical subunits?

Biology
You have a stock solution with following components: glucose: 44 g/L NaCl: 191 g/L Tris Buffer: 275 g/L You mix 71 mL of the solution with water and bring the resulting solution to a final volume of 750 mL. What is the final concentration of glucose in g/L?

Biology
You prepare a solution by dissolving 319 g of glucose and 114 g of NaCl in water and bring the final volume up to 1,088 mL. What is the final concentration of glucose in g/L?

Biology
Why do males have a higher blood pressure than females

Biology
The nucleus of an atom will NOT contain a)proton b)neutron c)electron could be multiple answers

Biology
The chemical reactivity of an atom is determined by the number of ___ present. a) proton b) neutron c) electron could be multiple answers.

Biology
A change in the number of ___ will change the mass of a given atom. a)proton b)neutron c)electron

Biology
If the number of ___ in an atom is changed, an ion will be produced. a)proton b)neutron c)electron Could be multiple answers

Biology
if the number of ____ in an atom is changed, it is no longer the same element. a)proton b)neutron c)electron I'm thinking it's A, what do you think? It could be multiple answers, too.

Anthropology
In every culture, cultural constructs will be found. What are the cultural constructs found in the U.S., and how are they used to define gender in society? Compare gender constructs in Pastoralist societies. What differences do you find between the United States and a ...

Biology
I'm trying to find out how regular cells are similar to cancer cells? I have read the chapter 2 times already and the only thing I can come up with is they both divide to make new cells.

Biology
Given 3x10^6 cell/mL in 3mL. Perform dilution calculation so that you can have 1x10^5 cell/200ul. Please help me with this question. Much appreciate.

biology
a category within biology that deals with the physical and chemical functions

Biology: I am really confused.
What is an experiment group and what is a control group? I was thinking an experiment group were people who experiment the world around them out of curiosity.... and that a control group was people who tried to make the world around them better.... is that right?

biology
a biologist prepared a strip of agar (a gelatin- like substance) as shown in the figure below. at position 7, he placed a concentrated sample of amino acid A and at position 1, a concentrated sample of enzyme E. E is known to catalyze the conversion of A to a product P. Assume...

Science plz help
Explain the basic parts of a major theme in molecular biology: the pathway of DNA to RNA to proteins. Include a general idea of what occurs at each stage

Biology
what will the final temperature be of a beaker of water weighing 100g if its initial temperature is 21 ° and is heated using 125 joules in energy?

biology
Suppose you have monohybrid snapdragons in your garden and you find that they produce red seeds to white seeds in the ratio of 3:1. If the alleles are designated R (red seeds) and r (white seeds), what are the probable phenotypes of the parents (P1)?

Biology
What is the result of a cross of a heterozygous curly winged fly to a straight-winged fly? (Include both genotype and phenotype with fractions of each) Do I need to make a monohybrid cross or a dihybrid cross?

Biology
Which of the following is true about DNA? It is a single-stranded molecules Only one of the original DNA strands acts as a template during replication. Both of the original DNA strands act as templates during replication. Its replication takes place in the cytosol.

Biology
Psychics and astrologers are characterized as:

Biology
You have a stock solution of 100mg/100ml methylene blue and you need 6.0 ml of final solution at 2mg/100ml. Design a serial dilution using volumes between 0.1 and 10 ml. Final volume must be 6ml.

Biology
You have a bacterial suspension and you need to dilute it to 0.0010 of the initial concentration so that you can determine the number of colonies per milliliter. The volumes must be between 0.1 and 2 ml. Your final volume must be 1 milliliter.

Biology
You need 25ml of 2% milk solution (v/v. How much milk and water will you need?

Biology
You have been asked to make 200ml of 50% detergent solution (v/v). How would you do it?

Biology
You need to prepare 270ml of a 20% sucrose solution (w/v). Sucrose has a molecular formula of C12H22O11. How would you prepare this solution?

Biology
Is xylem or phloem larger in a plant? My answer is xylem is larger in a plant than phloem.

Civics
In the case The Senate Of Tennessee V. John Thomas Scopes, high school biology teacher John Scopes was accused of teaching content that violated a Tennessee law that stopped public school teachers from teaching evolution. Scopes voted this law , but felt his right to free ...

Chemistry
Can someone please tell me what to expect from Beginner High School chemistry? Is it mostly applying mathematics like physics? Or basically memorizing like biology? Thank you!

Biology
You need to prepare a 0.25 M solution of NaCl but you only need 50 ml of this solution. How many grams of NaCl would you need?

Biology
How many grams of glucose are needed to make 500ml of a 3.0M solution of glucose?

Biology
You need to make 2.5L OF 3M H2SO4. H2SO4 comes as a stock solution in a concentration of 18M. How many ml of stock H2SO4 would you need to make the new solution?

Biology
Are bees and caterpillars apart of kingdom animalia?

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Homework Help: Science