Thursday
May 28, 2015

Homework Help: Science: Biology

Recent Homework Questions About Biology

Biology
explain the consequence of x chromosome inactivation in terms of the proteins encoded by the x chromosome genes?
Thursday, February 19, 2015 at 2:09pm

Biology
What happens as a result of insertion (the mutation)?
Tuesday, February 17, 2015 at 7:03pm

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...
Friday, February 13, 2015 at 2:53am

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?
Wednesday, February 11, 2015 at 9:05am

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
Wednesday, February 11, 2015 at 6:04am

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?
Tuesday, February 10, 2015 at 11:10pm

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?
Tuesday, February 10, 2015 at 10:46pm

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?
Tuesday, February 10, 2015 at 10:40pm

Biology
Why do males have a higher blood pressure than females
Monday, February 9, 2015 at 10:03pm

Biology
The nucleus of an atom will NOT contain a)proton b)neutron c)electron could be multiple answers
Monday, February 9, 2015 at 2:28pm

Biology
The chemical reactivity of an atom is determined by the number of ___ present. a) proton b) neutron c) electron could be multiple answers.
Monday, February 9, 2015 at 2:26pm

Biology
A change in the number of ___ will change the mass of a given atom. a)proton b)neutron c)electron
Monday, February 9, 2015 at 1:22pm

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
Monday, February 9, 2015 at 1:05pm

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.
Monday, February 9, 2015 at 12:56pm

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 ...
Saturday, January 31, 2015 at 10:57am

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.
Wednesday, January 28, 2015 at 10:07pm

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.
Wednesday, January 28, 2015 at 5:28pm

biology
a category within biology that deals with the physical and chemical functions
Wednesday, January 28, 2015 at 10:16am

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?
Tuesday, January 27, 2015 at 7:30pm

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...
Saturday, January 24, 2015 at 6:05pm

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
Friday, January 23, 2015 at 3:13pm

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?
Friday, January 23, 2015 at 12:37pm

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)?
Thursday, January 22, 2015 at 8:32am

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?
Wednesday, January 21, 2015 at 9:38am

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.
Tuesday, January 20, 2015 at 7:08pm

Biology
Psychics and astrologers are characterized as:
Monday, January 19, 2015 at 8:32pm

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.
Monday, January 19, 2015 at 11:58am

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.
Monday, January 19, 2015 at 11:56am

Biology
You need 25ml of 2% milk solution (v/v. How much milk and water will you need?
Monday, January 19, 2015 at 11:49am

Biology
You have been asked to make 200ml of 50% detergent solution (v/v). How would you do it?
Monday, January 19, 2015 at 11:47am

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?
Monday, January 19, 2015 at 11:46am

Biology
Is xylem or phloem larger in a plant? My answer is xylem is larger in a plant than phloem.
Monday, January 19, 2015 at 11:23am

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 ...
Sunday, January 18, 2015 at 5:58pm

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!
Saturday, January 17, 2015 at 9:12pm

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?
Thursday, January 15, 2015 at 10:55pm

Biology
How many grams of glucose are needed to make 500ml of a 3.0M solution of glucose?
Thursday, January 15, 2015 at 10:54pm

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?
Thursday, January 15, 2015 at 10:54pm

Biology
Are bees and caterpillars apart of kingdom animalia?
Thursday, January 15, 2015 at 1:54am

Biology
What is the name of the protein that breaks the hydrogen bonds in the double helix causing the DNA strands to separate during DNA replication? I have a test tomorrow so please help!
Wednesday, January 14, 2015 at 9:10pm

english
Who can give me a topic for research paper related to marine biology?
Wednesday, January 14, 2015 at 8:02pm

english
What is a topic that related to marine biology? And its topical outline?
Wednesday, January 14, 2015 at 7:45pm

English
What is a topic that related to marine biology? And its outline?
Wednesday, January 14, 2015 at 7:39pm

Biology
If P1 - virgin grey body, long wings female cross with P2 - ebony body vestigial wings male.... how do I figure out what the genotype is? I think it is like this... EVg for female and evg for male... but I honestly have no idea...
Wednesday, January 14, 2015 at 9:19am

Biology
I need to plan a lesson on 'Human Migration' to teach the class. This topic is from B3 GCSE. These are the learning points: ALL: Demonstrate an understanding of the impact of climate change of human behaviour, including: a- The effect of the Ice Age b- Human migration ...
Sunday, January 11, 2015 at 5:04pm

Biology
How do rocks store oxygen, and how did they come to store them?
Saturday, January 10, 2015 at 5:43pm

Biology
Is saliva(spit) a living thing?
Friday, January 9, 2015 at 2:43pm

Biology check please
1. Who most influenced Darwin's idea that life could change slowly over a long period of time? (1 point) Malthus Hutton and Lyell Lamarck livestock breeders and farmers 2. Who most influenced Darwin's idea that some offspring are better suited to survival than others...
Friday, January 9, 2015 at 2:11pm

Biology
Monohybrid Cross - crossing one single Trait to _______? Answer: two alleles
Wednesday, January 7, 2015 at 9:42am

Biology
Dominant - an organism with the dominant allele For a trait _________? Answer: that produces the same phenotype Recessive - an organism with the recessive Allele for a trait will __________? Answer : ?
Wednesday, January 7, 2015 at 9:26am

Biology Question
A cell is lacking in its supply of amino acids. Which of the following will occur? A- mRNA will not be formed because enzymes may not be present. B- The ribosomes will not work properly because there will be no proteins. C- tRNA may not be able to fulfill its job. D- all of ...
Friday, January 2, 2015 at 6:32pm

Biology
Does the electron transport chain part of cellular respiration involve carbon or carbon dioxide?
Friday, January 2, 2015 at 6:25pm

Biology Help Please
A cell is lacking in its supply of amino acids. Which of the following will occur? A- mRNA will not be formed because enzymes may not be present. B- The ribosomes will not work properly because there will be no proteins. C- tRNA may not be able to fulfill its job. D- all of ...
Friday, January 2, 2015 at 5:23pm

Biology
A cell is lacking in its supply of amino acids. Which of the following will occur? A- mRNA will not be formed because enzymes may not be present. B- The ribosomes will not work properly because there will be no proteins. C- tRNA may not be able to fulfill its job. D- all of ...
Thursday, January 1, 2015 at 6:31pm

Biology
Photosynthesis and cellular respiration are often described in two ways: (1) they are chemically opposite; and (2) they have a relationship to each other. Explain what these two statements mean. I need help with this please.
Thursday, January 1, 2015 at 1:43pm

^BiOlOgY^
Need Help~How does EXCRETION occur in SNAKES? What iz thier ORGAN ov EXCRETION? What form iz thier excretory waste?
Thursday, January 1, 2015 at 5:28am

biology
the four children of two parents each have a different blood group of the ABO series.what were the blood groups of the parents explain how?
Wednesday, December 31, 2014 at 10:48pm

biology
please explain clearly what is lymphocytes and its funtion?
Wednesday, December 31, 2014 at 10:44pm

biology
explain how we understand mendel's experiments?and what is phenotype?
Wednesday, December 31, 2014 at 10:40pm

biology
please explain complete process of mitosis and meiosis?
Wednesday, December 31, 2014 at 10:37pm

Biology
Which of the following sequences is an example of a point mutation of the DNA sequence -A-A-G-T-G-C- ? (What?) -A-A-A-T-G-C- -A-A-G-U-G-C- -G-T-A-G-A-A-C- -A-A-G-G-T-C-
Wednesday, December 31, 2014 at 8:43pm

Biology
Which of the following . is true about the DNA molecule during transcription? A- It opens up all of the way, one gene at a time. B- It unwinds from both ends. C- It makes a copy of itself. D- Only a small area is opened. My choice is C.
Wednesday, December 31, 2014 at 6:58pm

Biology
Which of the following is one role of RNA polymerase during transcription? A- to break down an already existing protein B- to produce a start sequence C- to build a molecule of mRNA D- to switch uracil with thymine on the exposed gene My choice is C.
Wednesday, December 31, 2014 at 6:57pm

biology
Specifically which phases for the Cell Cycle and Meiosis would you see significant differences in? Can someone please help me by explaining this to me?
Tuesday, December 30, 2014 at 6:55pm

biology
Which phases are exactly the same for both the Cell Cycle and Meiosis? Can someone please help me with this and explain this to me? Thank you :)
Tuesday, December 30, 2014 at 6:12pm

biology
Which phases are exactly the same for both the Cell Cycle and Meiosis? Can someone please help me with this and explain this to me? Thank you :)
Monday, December 29, 2014 at 9:12pm

Biology
Where does the carbon cycle end? My project asks this, but I can of no specific "ending."
Saturday, December 27, 2014 at 6:21pm

Biology
How does oxygen move in a food chain? When one organism eats another, does the oxygen move from the tissues of the prey to the predator, or is it something different?
Saturday, December 27, 2014 at 4:54pm

biology(really need help!)
What role does the lilac flower play in its natural ecosystem? What is its niche in the food web Are there any ecological issues surrounding the lilac flower(e.g. are its populations decreasing, is it spreading uncontrollably..)
Thursday, December 25, 2014 at 5:57pm

biology
What role does the lilac flower play in its natural ecosystem? What is its niche in the food web Are there any ecological issues surrounding the lilac flower(e.g. are its populations decreasing, is it spreading uncontrollably..)
Tuesday, December 23, 2014 at 10:52am

biology
What role does the lilac flower play in its natural ecosystem? What is its niche in the food web
Saturday, December 20, 2014 at 5:24pm

Biology
In an ecosystem, when energy is given off as heat, does it change forms from chemical substances to heat? Or is it something different?
Friday, December 19, 2014 at 8:26pm

biology,chemistry,physics
the contact process prepares purest form of sulphuric acid 2so2+o2=2so3 calculate its kp if following concentrations are found at equilibrium so2=0.59,o2=0.05 and so3=0.259
Thursday, December 18, 2014 at 6:28am

biology
Explain how a new population might be formed
Wednesday, December 17, 2014 at 9:15pm

biology
what is the most accepted mechanism for evolution
Wednesday, December 17, 2014 at 8:26pm

biology
Explain how a scientist would use DNA or protien sequences taken from three different organisms to create a cladogram
Wednesday, December 17, 2014 at 7:21pm

biology
Explain how a scientist would use DNA or protien sequences taken from three different organisms to create a cladogram?
Wednesday, December 17, 2014 at 12:43pm

Biology
If there are two sets of 21 chromosomes in a rats lung cell, how many total chromosomes are there in a cell that undergoes mitosis? Answer: 42
Monday, December 15, 2014 at 12:11am

Biology
The creation of sex cells occurs in meiosis. Explain what happens when a new organism is created and life begins. Answer: meiosis is a process of cell division that produces sex cells, or gametes. Gametes are reproductive cells such as the sperm and egg. As gametes are ...
Monday, December 15, 2014 at 12:02am

Biology
Explain what happens at the first checkpoint If GO is prevented from occuring. Answer: these cells can be called back from the G0 phase to the cell cycle by external cues
Sunday, December 14, 2014 at 11:22pm

Biology
If there are two sets of 21 chromosomes in a rat's lung cell, how many total chromosomes are there in a cell that undergoes mitosis? Answer: 42
Sunday, December 14, 2014 at 11:19pm

Biology
Male donkeys have 62 chromosomes in an eye cell. How many chromosomes would be found in a female donkeys egg? Answer: 62 Normally, pigs have 38 chromosomes in each somatic cell. How many chromosomes are there in a cell that has gone through meiosis? Answer: 19 How many ...
Sunday, December 14, 2014 at 10:50pm

Biology
Ferrets have 40 chromosomes in each heart cell. There are ___ chromosomes in each egg. Answer: 20 If a skunk has 25 chromosomes in each gamete, then how many chromosomes are in each sperm cell? Answer: 25 Sheep have 27 chromosomes in each cell that had undergone meiosis. How ...
Sunday, December 14, 2014 at 8:26pm

Biology
1. Ferrets have 40 chromosomes in each heart cell. There are ____ chromosomes in each egg. Answer: 20 2. If a skunk has 25 chromosomes in each gamete, then how many chromosomes are in each sperm cell? Answer: 25 3. Sheep have 27 chromosomes in each cell that has undergone ...
Sunday, December 14, 2014 at 7:49pm

biology
Explain parts of the stem structure in the lilac flower or a flower similar to the lilac flower
Saturday, December 13, 2014 at 6:16pm

biology
I need help finding diagrams of the leaf structure, stem structure and root structure of a lilac flower with explanations. Sites would help
Saturday, December 13, 2014 at 5:10pm

Biology
name three ways somatic cells are different from gamete cells. 1. Gametes are sex cells and are always haploid 2. Somatic cells are non sex cells 3. ?
Friday, December 12, 2014 at 8:50am

Biology
explain what would happen if sperm and egg cells were accidentally diploid. If the gametes were not haploid, then the fertilized zygote would have four sets of chromosomes and would probablydie before birth.
Friday, December 12, 2014 at 8:09am

Biology
Different types of plants may be angiosperms, vascular seed, vascular non-seed, or non-vascularplants 1) Short grass meadow----I def. know it's not an angiosperm but can it be vascular non-seed 2) Magwort---im debating if it's non-vascular 3) Chokeberry -- def not an ...
Wednesday, December 10, 2014 at 4:52pm

Biology quick question
What is the method of nitrogenous waste removal for the following & choose between ammonia, urea or uric acid Tunicates Fishes Amphibians Reptiles Birds Mammals I think tunicates are urea and fishes are ammonia? But please help because I'm not sure and I don't know ...
Wednesday, December 10, 2014 at 10:36am

Biology
"Emma has difficulty sleeping. Her doctor prescribes Deflex. Deflex is a drug which affects the nervous system. Suggest and explain how Deflex affects the nervous system to help Emma sleep." I have missed a lot of time off of school and I understand how the nervous ...
Wednesday, December 10, 2014 at 4:55am

Biology quick help
What is the method of nitrogenous waste removal for the following & choose between ammonia, urea or uric acid Tunicates Fishes Amphibians Reptiles Birds Mammals I think tunicates are urea and fishes are ammonia? But please help because I'm not sure and I don't know the...
Wednesday, December 10, 2014 at 1:13am

Biology
If all of our cells have the same DNA, how come all 23 of our chromosomes are shaped differently?
Wednesday, December 10, 2014 at 12:23am

Biology
What can I write for an assignment that asks me to write about what ecology means to me? I don't know exactly what is meant by "means to you," as in the assignment.
Monday, December 8, 2014 at 5:01pm

biology
What are some benefits and challenges of being a pharmacologist?
Monday, December 8, 2014 at 4:39pm

biology
explain the vascular system in the lilac flower.
Saturday, December 6, 2014 at 1:48pm

Biology
If 320 F2 offspring resulted from this F1 cross, how many would be green?
Saturday, December 6, 2014 at 12:13pm

Biology
Based on cellular respiration, what happens when oxygen supply is cut off to an animal?
Friday, December 5, 2014 at 8:27pm

Biology
what is the vascular system of the lilac flower. i tried finding some sites. some sites would help me. PLease!
Friday, December 5, 2014 at 6:27pm

biology
Explain the vascular system of a lilac flower Some sites would help me very much as i cant find any that explain the vascular system of the lilac flower.
Thursday, December 4, 2014 at 10:02pm

Biology
Pod color and pod shape were two other traits Mendel was interested in. Set up a dihybrid cross for these two traits. Note: Green pods are dominant over yellow pods and inflated pods are dominant over constricted pods. -Start off with both parents as heterozygotes/hybrids for...
Thursday, December 4, 2014 at 6:32pm

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Homework Help: Science

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