Friday
August 26, 2016

Homework Help: Science: Biology

Recent Homework Questions About Biology

Biology
How much sterile saline would you have to add to add to 0.25 mL of a serum sample in order to prepare 1/50 dilution of the serum?
Tuesday, October 20, 2015 by Tony

Biology
Is cooking oil healthy why or why not and are proteins more or less nutritious than fats why or why not?
Monday, October 19, 2015 by Daniela

HELP AP BIOLOGY
How would the results of the experiment be affected if you were sloppy and sometimes did not dry off the outside and/or ends of the dialysis bags prior to determining their masses? explain why this would matter.
Sunday, October 18, 2015 by Anonymous

Biology
What holds nitrogen bases together in a Double Helix? (DNA)
Saturday, October 17, 2015 by Anonymous

Biology
What do Nucleotide Chains create
Saturday, October 17, 2015 by Anonymous

Biology
Which features are common to all cells? Check all that apply. All cells have cytoskeleton lysosomes vacuoles the cytoplasm flagella and fimbriae photosynthetic membranes the plasma membrane ribosomes the cell wall genetic information (DNA) in chromosomes chloroplasts the ...
Saturday, October 17, 2015 by Anonymous

Biology
What are three sub unites or parts of a nucleotide
Saturday, October 17, 2015 by Anonymous

Biology
What are the four nitrogen bases of a DNA nucleotide
Saturday, October 17, 2015 by Anonymous

biology
A researcher wanted to know how many fish were in a dam.He caught 20 fish and marked them by clipping out a small section of their tail fins.He then released them back into dam.A few days later he caught 25 fish and found that 8 had been marked 1.estimate the total number of ...
Friday, October 16, 2015 by jeremy

biology
In an investigation to find the number of african potato plants in a field of area 6 000m^2 three plots were selected.each with an area of 10^2.Pot 1 contained three and the other plots contained seven and two african potato plans,respectively. 1.name two advantages of ...
Friday, October 16, 2015 by nicole

Biology
Cite a way the excretory system helps maintain homeostasis, besides removing wastes,water,carbon dioxide, and salts.
Wednesday, October 14, 2015 by Cassie

biology
why is anaphase the shortest stage in the cell cycle?
Wednesday, October 14, 2015 by alyssa

HELP HELP AP BIOLOGY
A. Explain the term "concentration gradient". Make sure to discuss the difference between a solution's concentration and a concentration gradient. B. An artificial cell contains 0.2 M FRUCTOSE and 0.8 M glucose, AND 2M SUCROSE. It is placed into a solution ...
Sunday, October 11, 2015 by Anonymous

Biology
I put them in order, but am not sure. Please take a look? Question: Put the following events of the adaptive immune response in the order they occur. (c) You cut yourself and bacteria enter the wound. (f) A dendrite near the cut phagocytizes some bacteria and uses MHC proteins...
Friday, October 9, 2015 by Anonymous

biology
why did dinosaurs evolve earlier than humans?
Friday, October 9, 2015 by mark

Biology
In phylogenetics, we use the terms monophyletic, polyphyletic, and paraphyletic. What do each of these terms mean? How might the concept of shared, derived traits fit with these terms? I know what each of the terms mean. I am not sure about the second question.
Thursday, October 8, 2015 by Sarah

Biology
List 3 differences between eukaryotic and prokaryotic genomes. Describe how one of these differences might impact laboratory applications. What are two issues that might arise when genetically engineering a prokaryotic cell to express a eukaryotic protein. I know three ...
Thursday, October 8, 2015 by Ana

Biology
The function of diastase and how it is affected by temperature. I got the function.. but i dont know how temperature affects diastase
Thursday, October 8, 2015 by Rose

Biology
What are the three conditions that must be met for natural selection to occur? What should happen if those three conditions are met? Define each type of natural selection, and describe what you expect to happen over time if these types of natural selection occur. Do these ...
Thursday, October 8, 2015 by Sarah

Biology
Why is the Hardy-Weinberg Theorem useful for studying evolutionary change? What are the assumptions of this model? How does it work (in other words, describe the procedure which is used and how you figure out genotype frequencies)?
Thursday, October 8, 2015 by Sarah

Biology
What 2 bio molecules are the cell membrane primarily made of?
Wednesday, October 7, 2015 by Janey

Biology
What is the difference between an environment with freshwater and an environment with pristine wates? I need to design an experiment with a shrimp that is found in freshwater but not in pristine but I don't understand what is the difference between the two. Thanks!
Wednesday, October 7, 2015 by Anonymous

Gr.11 Biology
In guinea pigs, black cot is dominant to albino. Rough coat us dominant to smooth coat. A black smooth guinea pig was mated with an albino rough guinea pig. Their offspring were black rough and black smooth. If these were the only produced over a period of years of matings, ...
Tuesday, October 6, 2015 by Helen

biology
You are preparing 500 mL of Denaturation Buffer containing 1.5 M NaCl and 0.5 M NaOH. Your stock solutions are 5 M NaCl and 6 M NaOH. How would you prepare the Denaturation Buffer? Include all of the solutions needed to make the buffer. For Nacl, C1V1=C2V2 5*V1=500*1.5 V1=150 ...
Monday, October 5, 2015 by sara

Biology
a. A human cell is placed in a container of sugar water. Explain what would occur, if the cell membrane is impermeable to sugar. I know that the water in the cell is the high concentration and will go to the sugar water which is the low concentration. b. Another cell is placed...
Monday, October 5, 2015 by Judy

biology
I am doing msc., degree . I want do project on clown fish but i did not select the topic till now. Can you help me to select topic
Monday, October 5, 2015 by madhumitha

Biology
Is the oval window soft or hard? Explain the advantage to your answer Personally I think it's soft and it's because being soft would it to be amplified to the ear hear things more clearly. Explain why a person with a sore throat may end up with a mild ear infection. I ...
Sunday, October 4, 2015 by Alex

Biology
Compare and contrast natural selection and artificial selection. All I can think of is that man controls what happens in artificial selection.
Sunday, October 4, 2015 by Anonymous

Biology
Evolution by artificial selection is a common way by which people breed plants and animals to have characteristics that we find desirable. Imagine that you are working in a lab where scientists are trying to breed a strain of apple that has much higher sugar content. How might...
Sunday, October 4, 2015 by Anonymous

Biology
You place a piece of paper on a balance and find that its mass is 0.63 g. You add a lump of NaOH to the paper and get a mass of 22.21 g. You remember that you forgot to tare the balance before taking this measurement. You tare the balance, add another lump of NaOH, and read 20...
Sunday, October 4, 2015 by Misaki

HELP HELP ap biology
field of view for 1000x total magnification is it .2 micrometers? help!
Saturday, October 3, 2015 by Anonymous

Gr. 11 biology
Your aunt moves out of the town and leaves you her mouse, Henry. In order to make some money, you decide to breed mouse and sell the offspring. In looking over Henry's family history, you discover that Henry's grandfather expressed a rare genetic disorder which leads ...
Saturday, October 3, 2015 by Helen

Gr.11 Biology
In humans, muscular dystrophy is a condition in which the muscles waste away during early life, resulting in death in the early teens. It is due to recessive sec-linked gene. A certain couple have 5 children- 3 boys, ages one, three and ten; and 2 girls, ages five and seven. ...
Saturday, October 3, 2015 by Helen

Biology
a. A human cell is placed in a container of sugar water. Explain what would occur, if the cell membrane is impermeable to sugar. b. Another cell is placed into a container of sugar water. However, this cell has the capability to allow large molecules such as sugar to pass ...
Saturday, October 3, 2015 by Eliza

Biology
What is true of the energy that is passed from one trophic level to the next in a food chain? A)About 10% of the energy passed from one level to the next is released as heat. B)About 10% of the stored energy of one level becomes stored energy at the next higher level. C)The ...
Thursday, October 1, 2015 by SkatingDJ

Biology - Genetics
Can someone please help explain in a step by step process how to do this problem and what it means? I do not understand what it is asking for exactly in regards to positive, negative, and the resistance gene and so forth...especially about the media being selective. What does ...
Thursday, October 1, 2015 by Misa

Biology
Synthesis means the process by which simple compounds are united to form more complex materials. Dehydration means loss of water. Explain why chemists refer to the joining of monosaccharide molecules to form disacchardies as dehydration synthesis reaction
Wednesday, September 30, 2015 by Anonymous

Science
I am writing a mock biotechnology research proposal for class and I don't know what I should make this research plan about. What are some of the most breaking scientific news, or diseases and issues in this field(biology preferred, or chemistry) that are currently having ...
Wednesday, September 30, 2015 by Betty

Biology
You find 3 trees where each tree gives a different coloured fruit: red, pink or orange. You perform crosses between all three trees and get the following results: P: red x pink ---F1: ½ red: ½ pink P: red x orange --- F1: ½ red: ½ orange P: pink x ...
Sunday, September 27, 2015 by James

biology
What does a chameleon do for the environment?
Sunday, September 27, 2015 by anon

biology
Which of the following is the key factor driving cellular differentiation in the body? a. chemical gradients in the cellular environment b. expression of genetic coding c. rate of transcription d. cellular nutritional status c?
Saturday, September 26, 2015 by Time

biology
In evolutionary terms, RNA is thought to have preceded proteins and DNA. Which of the following provides the most convincing support for this hypothesis? a. there are more types of RNA than there are of DNA b. RNA can both store genetic information and act as an enzyme c. ...
Saturday, September 26, 2015 by Time

Biology
Could someone please help me with this question. 1100KJ in the form of x*y^2 Thank you for your time and help
Friday, September 25, 2015 by Cherie

biology-microscope
1. should the aperture diaphragm be adjusted to its most open or its least open setting, to begin? 2.where should the stage be set when you first observe the specimen, using the low power objective lens?
Friday, September 25, 2015 by Anonymous

biology
what is the difference between an exergonic reaction and an endergonic reaction?
Thursday, September 24, 2015 by daniel

biology
Which of the following is the key factor driving cellular differentiation in the body? a. chemical gradients in the cellular environment b. expression of genetic coding c. rate of transcription d. cellular nutritional status c? confused cuz transcription is the first step in ...
Thursday, September 24, 2015 by help please

biology
In evolutionary terms, RNA is thought to have preceded proteins and DNA. Which of the following provides the most convincing support for this hypothesis? a. there are more types of RNA than there are of DNA b. RNA can both store genetic information and act as an enzyme c. ...
Thursday, September 24, 2015 by Tim

Biology
Which of these classifications is most specific? Family Genus Phylum Order I really need help on this question, and if u can do it THANK YOU SO MUCH! Its for my Biology test.
Thursday, September 24, 2015 by Michael

Biology
2. Which macromolecules were present in your saliva
Thursday, September 24, 2015 by Shia

biology
In evolutionary terms, RNA is thought to have preceded proteins and DNA. Which of the following provides the most convincing support for this hypothesis? a. there are more types of RNA than there are of DNA b. RNA can both store genetic information and act as an enzyme c. ...
Thursday, September 24, 2015 by Tim

biology
Which of the following is the key factor driving cellular differentiation in the body? a. chemical gradients in the cellular environment b. expression of genetic coding c. rate of transcription d. cellular nutritional status c? confused cuz transcription is the first step in ...
Thursday, September 24, 2015 by SOS

Biology
How would you prepare 100 ml of the following aqueous solution: 25 mM TrisCl, 50 mM EDTA, 2% (w/v) NaCl, 5 X M9? You have been provided with stock solutions of 1 M TrisCl, 0.5 M EDTA, 25 X M9 and crystals of NaCl.
Thursday, September 24, 2015 by Madie

Biology
What is the phase where chromatin condenses to form chromosomes
Wednesday, September 23, 2015 by John

algebra
An “A” is considered 4.0, a “B” is 3.0, a “C” is 2.0, a “D” is 1.0, and an “F” is 0. In your first semester you received the following grades. Calculate your grade point average English = credits 3.0 Grade = C Biology = credits...
Tuesday, September 22, 2015 by Kristen

Biology/ Chemistry
You want to prepare 0.5 L (500mL) of a 0.250M Na2SO4 solution. How many grams of do you need to measure out for the solution? [MW of Na2SO4 = 142 g
Monday, September 21, 2015 by Aileen

Biology
Osmosis is an example of passive transport. How might the results have changed in this lab if the gummy bear had been able to use active transport to move sugars out?
Monday, September 21, 2015 by Ariel

Biology
Imagine that you have a stock solution with a concentration of 4.6 M glucose (C1). You want to use the stock solution to prepare a diluted solution of 0.22M glucose (C2). You need a total volume of 10mL of 0.22M glucose (V2). What volume of water you need to use for making 0....
Sunday, September 20, 2015 by Marco

Biology
What roles do survival and reproduction play in the evolution of antibiotic resistance?
Sunday, September 20, 2015 by Anonymous

Biology
What role does mutation play in the evolution of antibiotic resistance?
Sunday, September 20, 2015 by Anonymous

Biology
What are the differences between primary succesion and secondary? Why are there these differences? How do I answer the second question
Saturday, September 19, 2015 by Anonymous

Biology
1.A white flowered plants is crossed with a plant that is heterozygous for the trait. What percentage of he offspring will have purple flowers? 2.Two plants, both heterozygous for he gene that controls flower color are crossed. What percentage of their offspring will have ...
Saturday, September 19, 2015 by Gina

Biology
Which statement is not true regarding illness associated with malfunctioning cellular organelles? The illness _____ a. can result in a diverse set of sumptoms b. may impact multiple body systems c. is typically simple to diagnose d. may be lethal
Saturday, September 19, 2015 by Gina

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 ...
Wednesday, September 16, 2015 by Jello

biology
a field mouse eats 10000 g of leaves each year, among other things. If each gram of leaves has absorbed 150kj of energy from the sun, about how much energy is available for the mouse ?
Wednesday, September 16, 2015 by radman

biology
digital readout for micropipettor for 0 7 0 in microliters?
Tuesday, September 15, 2015 by Anonymous

biology
which micropipettor would be appropriate to measure 250 microliters? P20, P200, or P1000?
Tuesday, September 15, 2015 by Anonymous

ap biology
why should you not rotate the volume adjuster of a micropipettor above or below the range written on the instrument? what two things could happen?
Tuesday, September 15, 2015 by Anonymous

ap biology
If you have fluid in the pipet tip and want to expel it all, should you only depress the plunger to the first stop or should you continue on to the second stop? why not choose the other option? what could happen?
Tuesday, September 15, 2015 by Anonymous

ap biology
if you depress the plunger to the first stop, place the tip into a solution and then release the plunger, does it withdraw the sample, expel the sample, or eject the tip?
Tuesday, September 15, 2015 by Anonymous

biology
Besides coal and oil (fossil fuels) what type of rocks store a great deal of carbon?
Tuesday, September 15, 2015 by Clarissa

ap biology
why should you not rotate the volume adjuster of a micropipettor above or below the range written on the instrument?
Tuesday, September 15, 2015 by Anonymous

Biology (Genetics)
How would you solve these problems? I am confused about what it is asking and how to start it. A step by step process with explanation would be greatly appreciated. Also, are there any simple ways to work out the problems without getting confused, or is there a way to know ...
Tuesday, September 15, 2015 by Airin

Biology
Based on Figure 2-4, what is the mass number of carbon? It says on the table (2-4) that carbon has 6 neutrons and 6 atomic number How do I solve this? Please help!
Monday, September 14, 2015 by SkatingDJ

Biology
The maltose molecule can be broken down into two individual glucose molecules with the help of an enzyme produced within a cell. Which of the following changes is most likely to slow down this reaction? Adding more maltose molecules Increasing the volume of the cell Adding ...
Monday, September 14, 2015 by eee

biology
circle all the things from the list that would be included in a community. Explain why you circled those items. deer ticks mushrooms rotting leaves lady bug 3 inches of rainfall oak tree soil 75 degrees celsius kudzu 6 hours of daylight
Sunday, September 13, 2015 by biology

Physics
how are the fundamental laws and principles of physics related to the complexity that we see in nature? 2) How do the laws of physics apply to other sciences such ad biology, chemistry, and earth science? Give a specific example to show the connection - is it because there ...
Sunday, September 13, 2015 by anonymous

Biology
My mom was average height and my dad was short and mine short. I am think my genotype is heterozgous. My mom weight is average and my dad was overweight and my was average. I am think my genotype is homozygous.
Saturday, September 12, 2015 by M

Biology
My hair color is blonde and so is my parents.What is my genotype?
Saturday, September 12, 2015 by M

Biology
My mom has eye color hazel and my dad has the eye blue and my eye color is blue. Would my Genotype be homozgous? My mom hair has blonde and my dad has blonde hair and I have blonde hair would my genotype be heterozgyous? Biology - woody, Friday, Se
Friday, September 11, 2015 by M

Biology
My mom has eye color hazel and my dad has the eye blue and my eye color is blue. Would my Genotype be homozgous? My mom hair has blonde and my dad has blonde hair and I have blonde hair would my genotype be heterozgyous?
Friday, September 11, 2015 by M

biology
An individual who is heterozygous for Eye color would be? A.two alleles for brown eyes. B. One allele for brown eyes and one blue eyes. C.two alleles for blue eyes.d.blue eyes I am think b.
Friday, September 11, 2015 by woody

Biology
how does the number of electrons in an atom determine what kind of bond it can form?
Friday, September 11, 2015 by dylan

biology
circle all the things from the list that would be included in a community. explain why you circles those items. deer ticks mushrooms rotting leaves lady bug 3 inches of rainfall oak tree soil 75 degrees Celsius kudzu 6 hours of daylight
Thursday, September 10, 2015 by sahsa

biology
the species in a forest include moose, wolves, lichens, mosses, lake trout, mosquitoes, and spruce trees, what level of organization does this group of species form?? is it community?
Thursday, September 10, 2015 by sahsa

Biology
Which of the following depends on bacteria?
Wednesday, September 9, 2015 by Megan

Biology
Which of the following properties of water would be most important in protecting a fish in a shallow pond on a hot summer day? the low density of water in the solid phase water’s strong forces of adhesion water’s high specific heat water’s solvent properties ...
Wednesday, September 9, 2015 by SkatingDJ

Biology
1) Large/tough seeds act as a selection pressure on what trait? a. Large bills b.Large feathers c.Dark feathers d.Long tails 2) What causes the change in bill depth between 1976 and 1978? a.The lack of rain b.The persistence of only larger seeds c.Differential survival of ...
Sunday, September 6, 2015 by Need Help Urgent

Biology
I did a lab and have been graded already. One of the questions asked us to pick good scientific questions from a list of choices. One of the choices read, "What soil properties determine the resulting color of a plant's flowers?". Note: I have changed the wording...
Saturday, September 5, 2015 by dylan

Biology
Justify why it is important to scientists to have a universal system of measurements. What does this mean? Can someone help explain it to me? I'm doing some research but I'm still confused. Please help? Thanks
Thursday, September 3, 2015 by SkatingDJ

biology
which of the following is a characteristic that could be applied to both living and nonliving things
Wednesday, September 2, 2015 by ciara

biology
Disadvantages of cross pollination
Wednesday, September 2, 2015 by lillian

Biology
Of the following, which is the most likely consequence of a manufacturing plant dumping its chemical waste into a nearby stream? increased oxygen levels in the water decreased flow rate of the stream loss of a keystone species an algal bloom <- my answer My question is ...
Wednesday, September 2, 2015 by Steve

biology
which of the following undergoes change during a chemical reaction
Tuesday, September 1, 2015 by ciara

biology
What type of extraction is needed to isolate integral proteins? (Hint: a type of amphipathic molecule is in this solution)
Sunday, August 30, 2015 by Belle

biology
What types of amino acids and domains are found in the "transmembrane" region of these proteins?
Sunday, August 30, 2015 by Bri

Biology
How does the "Patching and Capping" experiment verify the fluid concept of the Fluid Mosaic model?
Sunday, August 30, 2015 by Bri

biology-science
organism: 7 characteristics that make up all organisms biosphere: name our biospherE?
Wednesday, August 26, 2015 by kasha

biology
how is a protein different from a complex carbohydrate
Wednesday, August 26, 2015 by ciara

biology
why is carbon so abundant in living things when oxygen is the most abundant element on earth
Wednesday, August 26, 2015 by ciara

Biology -- metric
Which statement best describes the significance of the number 10 in the metric system? The system is used by 10 countries There are 10 metric prefixes There are 10 base units The system is based on multiples of 10. * my answer How many places would the decimal move in a ...
Tuesday, August 25, 2015 by Anonymous

  1. Pages:
  2. <<Prev
  3. 1
  4. 2
  5. 3
  6. 4
  7. 5
  8. 6
  9. 7
  10. 8
  11. 9
  12. 10
  13. 11
  14. 12
  15. 13
  16. 14
  17. 15
  18. Next>>

Homework Help: Science