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November 28, 2014

Homework Help: Science: Biology

Recent Homework Questions About Biology

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Biology
Difference between medukka and pyramid in a kidney?(:
Wednesday, October 19, 2011 at 10:36pm

Biology
Do plants make their own cell wall or is it already there ?
Wednesday, October 19, 2011 at 9:19pm

biology
List 2 ways in which prokaryotic and eukaryotic cells are alike and 2 ways in which they are different. Is this correct? Alike= cell membrane and DNA Different=ribosomes and mitochondria
Wednesday, October 19, 2011 at 8:06pm

biology
List 2 ways in which prokaryotic and eukaryotic cells are alike and 2 ways in which they are different. Is this correct? Alike= cell membrane and DNA Different=ribosomes and mitochondria
Wednesday, October 19, 2011 at 7:51pm

Biology
What is Parkinson's & Alzheimer's disease? Explain each based on their causative agent,means of transsmission,prevention&control.
Wednesday, October 19, 2011 at 12:53pm

Biology
A lilly from a true-breeding line with white flowers and short corollas (line A) is crossed to a lilly from a true-breeding line with black flowers and long corollas (line B). The resulting offspring, the F1, are all red-flowered, with corollas of medium length. a) Suppose an ...
Tuesday, October 18, 2011 at 11:02pm

biology
In some breeds of dogs, a dominant gene B controls the trait of barking. If a breeder wants to produce a true-breeding strain of barkers, but knows that the allele for silent dogs (b) is present amongst the barking dogs in his kennels, how could he determine which of his ...
Tuesday, October 18, 2011 at 2:12am

biology
A woman has difficulty becoming pregnant and when her karyotype is examined it is found that she is heterozygous for a large reciprocal translocation between her second and seventh chromosomes. a) is it possible for her to have a child? b) How can her infertility be explained...
Monday, October 17, 2011 at 10:41pm

Biology
In drosophila , short wings , and black colour are reccessive traits.long wings and grey colour are dominant. show the cross results between a short winged , heterozygous grey fly and a heterzygous long winged grey fly
Monday, October 17, 2011 at 10:22pm

biology
An individual with Down's syndrome has repeat length alleles of size 8, 13, and 14 for a microsatellite near the centromere of chromosome 23. Her mother is homozygous for the 13 repeat allele. Her father is heterozygous for 8 and 14. What can we say about the origin of ...
Monday, October 17, 2011 at 10:19pm

biology
Suppose we want to maintain a large number of homozygous lethal chromosomes, exposed to chemical mutagens, for a mutation screening experiment in a small orb web building spider species. One of these lines has a dominant mutant named Disordered (D) that results in “messy...
Monday, October 17, 2011 at 10:18pm

Biology
All cell are surrounded by membranes. The main role of the cell membrane is to A.regulate the cell's interactions with the environment b.release any type of molecule out of the cell c.arrange the cell's organelles in the cytoplasm d.prevent water from leaking out of ...
Monday, October 17, 2011 at 7:46pm

Biology
Which root system is most effect anchor? And which is the most effective for storage of nutrients, why? I thought that the best anchor would be the taproot but I don't know how to figure out which is best for storing nutirents?
Monday, October 17, 2011 at 7:06pm

Biology
All cell are surrounded by membranes. The main role of the cell membrane is to A.regulate the cell's interactions with the environment b.release any type of molecule out of the cell c.arrange the cell's organelles in the cytoplasm d.prevent water from leaking out of ...
Monday, October 17, 2011 at 7:03pm

Biology
Name all the structures that bile passes through (in order) from its creation to where it actually functions.
Monday, October 17, 2011 at 6:36pm

Biology
Which internal organs of the fetal pig appear to have the greatest amounts of blood supplied to them? Why does this make sense?
Monday, October 17, 2011 at 11:23am

Biology
Is the pancreas an exocrine or endocrine gland? Indicate the anatomical evidence on your fetal pig. What are its contributions to digestion and where are they added to the digestive tract?
Monday, October 17, 2011 at 11:09am

Biology
What is Ethology?
Monday, October 17, 2011 at 9:57am

biology genetics
In Leghorn chickens, + stands for colored feathers and C represents white feathers. At an independently inherited gene, the allele + inhibits color expression, whereas I has no effect on color expression
Sunday, October 16, 2011 at 4:25pm

Biology
In goats, the allele for black hair is dominant to that for red. Two black haired goats mated, producing twelve offspring. Of the first eleven, 8 had black hair and 3 had red hair. What is the probability of the twelfth offspring having red hair?
Sunday, October 16, 2011 at 4:37am

Biology
What does it mean to say that two genes are "linked"? Can linked genes assort independently? Why or why not?
Saturday, October 15, 2011 at 11:09pm

Biology (genetics)
The RAS protein acquires a mutation that prevents release of GTP. Which of the following characteristics are these cells likely to acquire? a)Self-sufficiency in growth signals b) insensitivity to anti growth signals c) angiogenesis d) metastasis e) blocking apoptosis I ...
Saturday, October 15, 2011 at 3:02am

biology
A 28.0-g sample of ice at -18.0°C is mixed with 124.0 g of water at 85.0°C. Calculate the final temperature of the mixture assuming no heat loss to the surroundings. The heat capacities of H2O(s) and H2O(l) are 2.08 and 4.18 J/g · °C, respectively, and the ...
Saturday, October 15, 2011 at 2:51am

Scholarship
Please revise my essay by giving tip or suggestions. A scholarship like “The FATE” will help me achieve my educational & career goals. “The FATE” not only will benefit financially but it will also boost my self-confidence, give me greater power of ...
Friday, October 14, 2011 at 3:06pm

Biology( HELP PLEASE)
give the two possible alleles in the eggs produced by a women whose genotype is JjKkLl
Friday, October 14, 2011 at 2:17pm

Biology
How is it a solution of 300mOsM NaCl is both isotonic and isosmotic to a red blood cell with an osmolarity of 300mOsM? Yet a solution of 300mOsM urea is only isosmotic to that red blood cell?
Friday, October 14, 2011 at 2:21am

Biology
What is the first step in replication?
Wednesday, October 12, 2011 at 8:44pm

college biology
In testing synaptic transmission, you found that there were 300 failures in 1000 trails of stimulating a presynaptic neuron. The average EPSP size was .7 mV +/- .2mV (mean +/- SD), and the average 'mini' EPSP size was .6mV +/- .1mV. Does the synapse obey Poisson stati...
Wednesday, October 12, 2011 at 5:38pm

biology
what salts are present in the composition of human sweat. Find out what elements are present in the composition of human sweat and what salts are formed by these elements.
Tuesday, October 11, 2011 at 3:45pm

Biology
Why (in detail please) in the carboxypeptidase mechanism, the weak bonds between an enzyme and a substrate will stretch the peptide bond of the substrate which lowers the bond energy? I just want to know why in detail this happens... Thank you.
Sunday, October 9, 2011 at 8:59pm

Biology
Why does Beta Glucose chains have more weak bonds between the chains than there are between alpha glucose chains?
Sunday, October 9, 2011 at 8:00pm

Biology
I'm not sure how to answer one of my homework questions. SraJMCGIN was nice enough to direct me to a site but I already had been there. My teacher kinda of indicted it was true but I don't know how it can- could someone take a second look, please at this question? Is ...
Sunday, October 9, 2011 at 7:01pm

Biology-9th grade
I'm not sure how to answer one of my homework questions. Is one function of the alveoli to filter out dirt and pollen before it reaches the lung and why or why not. I don't think it is because the alveoli are used to oxgenate the blood, correct. I don't think they ...
Sunday, October 9, 2011 at 3:58pm

College biology
In testing synaptic transmission, you found that there were 300 failures in 1000 trails of stimulating a presynaptic neuron. The average EPSP size was .7 mV +/- .2mV (mean +/- SD), and the average 'mini' EPSP size was .6mV +/- .1mV. Does the synapse obey Poisson ...
Saturday, October 8, 2011 at 5:23pm

biology
Are the categories animallike, plantlike, or funguslike useful in classifying protists? Please explain.
Saturday, October 8, 2011 at 4:52pm

College biology
In testing synaptic transmission, you found that there were 300 failures in 1000 trails of stimulating a presynaptic neuron. The average EPSP size was .7 mV +/- .2mV (mean +/- SD), and the average 'mini' EPSP size was .6mV +/- .1mV. Does the synapse obey Poisson ...
Saturday, October 8, 2011 at 2:44pm

College biology
In testing synaptic transmission, you found that there were 300 failures in 1000 trails of stimulating a presynaptic neuron. The average EPSP size was .7 mV +/- .2mV (mean +/- SD), and the average 'mini' EPSP size was .6mV +/- .1mV. Does the synapse obey Poisson ...
Saturday, October 8, 2011 at 2:43pm

Biology
Can DNA control how many teeth we will have?
Thursday, October 6, 2011 at 11:00pm

Statistics
A student science club consists of 20 biology majors, 13 chemistry majors, and 8 physics majors. One student from each of the three sciences is to be selected to participate in a special project. How many different ways can these three students be selected?How many ways can ...
Thursday, October 6, 2011 at 5:13pm

Biology
Using Darwin’s Theory of Evolution, describe how Eukaryotic cells could have developed from Prokaryotic cells. What advantages would the Eukaryotic cells have over the Prokaryotic?
Thursday, October 6, 2011 at 2:18pm

biology
depict the following dilutions series: 1:4 1:16 1:64 IN A FINAL VOLUME OF 200ML
Wednesday, October 5, 2011 at 12:19pm

biology
plzzzz,write differences between vegetative propagation and artificial vegetative propagation.(at least five)
Wednesday, October 5, 2011 at 10:10am

Biology
how many mL of concentrated (15 M) hydrochloric acid (HCL) are required to prepare 500 mL of 6 M hydrochloric acid?
Tuesday, October 4, 2011 at 5:18pm

biology
what is grana?
Monday, October 3, 2011 at 9:45pm

biology
what is activation energy?
Monday, October 3, 2011 at 2:02pm

biology
Hi there! I have this question for my bio/genetics homework, and I can't seem to figure it out. It reads, "A true-breeding red snapdragon is crossed to a true-breeding white snapdragon. The F1 progeny are all red. When the F1 is selfed, the following F2 progeny are ...
Monday, October 3, 2011 at 3:14am

AP Biology
Why can't humans drink salt water for hydration?
Sunday, October 2, 2011 at 9:25pm

biology
Can someone please explain to me the difference between gram-positive & gram-negative bacteria. What are they, what do they do? EXPLAIN I know that you can tell them apart by the method called gram staining. The gram consists of two dyes one violet which is the primary one and...
Sunday, October 2, 2011 at 7:45pm

Biology
What is the difference between an action and absorption spectrum? (We're talking about photosynthesis and the colors absorbed and such)
Sunday, October 2, 2011 at 6:46pm

Biology
explain the progression of the atmosphere from prebiotic to its current makeup
Sunday, October 2, 2011 at 6:16pm

Biology
(Is my answer right or wrong because i have no idea.) Why is the caspid protein important? The caspid includes protein that enable a virus to enter a host cell. The caspid protein of a typical virus bind to the surface of a cell and "tricks" the cell into allowing it...
Sunday, October 2, 2011 at 5:39pm

biology
how to predict proteins function base on protein 3D structure?
Sunday, October 2, 2011 at 2:27am

biology
Question: What are the distinguishing characteristics of prokaryotes? My Answer: Prokaryotes range in size from 1 to 5 micrometers, making them much smaller than most eukaryoteic cells. Prokaryotes can be divided into two very different groups Eubacteria and Archaebacteria. Am...
Saturday, October 1, 2011 at 5:12pm

Biology
The shrunken gene of wheat encodes a large enzyme that converts glucose to starch in its grains. How would insertion of a 1 kb transposon into codon 23 of this gene affect the protein produced from this allele? A. The protein would be longer and still functional. B. The ...
Friday, September 30, 2011 at 12:55am

biology
A red blood cell is placed into each of the following solutions. Indicate whether crenation, hemolysis, or neither will occur. Solution A: 3.21% (m/v) NaCl Solution B: 1.65% (m/v) glucose Solution C: distilled H2O Solution D: 6.97% (m/v) glucose Solution E: 5.0% (m/v) glucose ...
Thursday, September 29, 2011 at 12:59pm

math/science
Please can you explain how to do the following: a) a non-smoker with low blood pressure has a plasma chloesterol concentration of 5mmol per litre. Over a period of time this concentration increases to 8mmol per litre. By how many times has this risk of heart disease increased...
Thursday, September 29, 2011 at 4:08am

Biology
Animal cells can take up sucrose against its concentration gradient using a Na+/sucrose symporter. Indicate if the following statements are true or false. 1. In the Na+/sucrose symporter Na+ is also moving against its concentration gradient. False 2. For the symporter to work...
Thursday, September 29, 2011 at 12:05am

biology
Please can you explain how to do the following: a) a non-smoker with low blood pressure has a plasma chloesterol concentration of 5mmol per litre. Over a period of time this concentration increases to 8mmol per litre. By how many times has this risk of heart disease increased...
Wednesday, September 28, 2011 at 2:38pm

Biology
1. How much of the world's population is found in developing countries? Answer a. 44% b. 82% c. 18% d. 52% e. 97% 2.1 percent?
Wednesday, September 28, 2011 at 1:49pm

biology
A. The change in Gibbs free energy of ATP synthesis (acknowledging the body requires 46.3 kJ/mole) is.. This reaction is endergonic or exergonic? The energy for ATP synthesis comes from Is energy used to make ATP transferred in a single reaction or is it the sum of many? ...
Wednesday, September 28, 2011 at 1:34pm

Biology
The process that traps solids in the cell membrane and brings them into the cell is called: pinocytosis phagocytosis ion pumps I think it is phagocytosis because pinocytosis brings in fluid and dissolved substances. I'm not sure if I'm right
Wednesday, September 28, 2011 at 10:05am

biology
i didnt really get any help scientific theory of how life began? any ideas like a easy thing to write about plz
Tuesday, September 27, 2011 at 4:08pm

biology
Evidence of bacteria-like life has been found in fossils that date back between 3.4 and 3.5 billion years. Can you find out what the oldest evidence of multi-celled life is?
Tuesday, September 27, 2011 at 3:40pm

biology
ok so i was learning about cell theory and i am really stuck on this question The text describes one of the scientific theories of where life comes from(which was the cell theory). Find one other scientific theory of how life began and tell me about it. (There are many non-...
Tuesday, September 27, 2011 at 3:13pm

Biology honors (High School)
How does a turbine generate electricity?
Monday, September 26, 2011 at 8:48pm

Biology-- cells
Explain why stomach cells have a large quantity of ribosomes and golgi apparatus ?
Sunday, September 25, 2011 at 8:15pm

Math
100 students were asked whether they are taking psychology or biology. 61 were taking pyschology, 18 were taking both and 12 were taking neither. how many were taking biology?
Sunday, September 25, 2011 at 4:03pm

Math
In a group of 40 students, all students study maths, 28 study biology and math, 20 students study geography and maths and x students study all three subjects. a. Draw a venn diagram to represent the information above, showing in terms of x, the number of students in each ...
Sunday, September 25, 2011 at 1:51pm

biology
is it possible a son is biologicaly older than his parent?
Sunday, September 25, 2011 at 12:34am

biology
With regard to bringing solutes into the cell across the plasma membrane, discuss the advantages and disadvantages of diffusion, facilitated diffusion,active transport,and endocytosis.
Thursday, September 22, 2011 at 7:04pm

Biology
This is a choose the best answer question: The location of protein synthesis in eukaryotic cells is the a)nucleus. b)cytoplasm. c)plasma membrane. d)Golgi apparatus. d)vacuole. Ok so I know that the sites for protein sythesis are the ribosomes and there are ribosomes on the ...
Thursday, September 22, 2011 at 5:03pm

biology
Lack of iron in the photic zone of the open ocean restricts the size of plankton populations. Iron is what kind of factor for marine plankton?
Thursday, September 22, 2011 at 5:01pm

Biology
This is a choose the best answer question: The location of protein synthesis in eukaryotic cells is the a)nucleus. b)cytoplasm. c)plasma membrane. d)Golgi apparatus. d)vacuole. Ok so I know that the sites for protein sythesis are the ribosomes and there are ribosomes on the ...
Thursday, September 22, 2011 at 3:55pm

Animal Skeletal and Muscular Systems
1.) The development of an animal follows which of the following growth sequences? a. cells, organs, tissues, organ systems b. cells, tissues, organs, organ systems c. cells, organ systems, tissues, organs, d. tissues, cells, organs, organ systems 2.) During an operation, a ...
Wednesday, September 21, 2011 at 11:36pm

Biology
What is technolgy?
Wednesday, September 21, 2011 at 8:53pm

Biology
What is the 5th characteristic for all living things? I already have: 1. Heredity 2. Metabolism 3. Reproduction 4. Homeostasis
Wednesday, September 21, 2011 at 7:33pm

biology
explain why the synthesis of proteins, DNA and RNA requires energy. thanks :)
Wednesday, September 21, 2011 at 11:55am

biology
outline why energy is needed for each of these processes: a. the transport of sucrose in a plant b the transmission of an action potential along a nerve axon c. the selective reabsorption of glucose from a kidney nephron I'm not exactly sure how I'm supposed to answer ...
Wednesday, September 21, 2011 at 9:02am

English
I urgently need you to answer this question: 1) Is class the American English for lesson? Because students are asked to choose among three alternatives (one must be correct): a) lesson b) subject c) course If your next ....... is chemistry, physics or biology, go to the labs...
Wednesday, September 21, 2011 at 8:50am

biology
Suppose that I have one liter of water in which the ionization of water molecules has attained equilibrium. What is the hydrogen ion concentration or [H+] of this solution?
Wednesday, September 21, 2011 at 12:40am

Biology
What are two major flaws in the Phylogenetic Tree System?
Tuesday, September 20, 2011 at 10:11pm

English
I just wanted to know which alternatives are better. Thank you very much for your help. 1)I hate doing shopping OR the shopping”?). 2) I do some football OR I play football). 3) I like reading war and car books OR war books and car magazines (?) and collecting model cars...
Tuesday, September 20, 2011 at 5:59pm

Englisch
Can somebody help me to write a summary? The article "Towards a greener Economy?, written in 2009 by friedman, deals about the economic system in unsustainable. The satirical newspaper decribe the americans are wasteful. Than i dont know how can i write the rest of the ...
Tuesday, September 20, 2011 at 12:55pm

Biology
A student claims the probability a human sperm will receive all chromatids of maternal origin is 50 %. Explain why she is wrong. Are the following true or false and support your answer: i. Red blood cells and nerve cells in adult humans are suitable for karyotyping (...
Monday, September 19, 2011 at 10:10am

statistics
1. Use the following information about a group of college students: Fifty percent are taking Algebra. Sixty percent are taking Biology. Thirty percent are taking both Biology and Algebra. A student from the group is selected at random, calculate the following: a) The ...
Sunday, September 18, 2011 at 11:58pm

Biology
Describe how DNA is converted, during transcription, into mRNA through initiation, elongation and termination. In addition, describe how RNA is converted to proteins through the steps of initiation, elongation, and termination.
Sunday, September 18, 2011 at 7:26pm

biology
How would you measure chloride current during an action potential
Sunday, September 18, 2011 at 7:09pm

Biology
why correcting lens is not used so often in microscope ?
Saturday, September 17, 2011 at 9:40pm

Biology
A student claims the probability a human sperm will receive all chromatids of maternal origin is 50 %. Explain why she is wrong.
Saturday, September 17, 2011 at 9:26pm

Biology
A student claims the probability a human sperm will receive all chromatids of maternal origin is 50 %. Explain why she is wrong.
Saturday, September 17, 2011 at 3:56pm

Science
Hi, I have two questions about biology I need help with. 1) Some questions fall outside the realm of science, which of the following questions could not be answered using the scientific method? A)What is the function of the appendix in human beings? B) Why is it unethical to ...
Saturday, September 17, 2011 at 2:55pm

Biology
In a mouse cell at the start of mitosis, how many chromatids are present?
Friday, September 16, 2011 at 7:49pm

Biology
Typically we talk about blood types as B-positive or AB-negative and so forth. The positive and negative part of the blood type is determined by a completely separate gene (the Rh locus). The ABO locus and the Rh locus are inherited independently, like pea shape and pea color...
Friday, September 16, 2011 at 7:49pm

Biology
3. The ABO blood type is controlled by a single locus, called I, with alleles IA, IB, and IO. These give rise to the blood type phenotypes, A, B, AB, and O. a. Suppose that parents know their phenotypes: the father is type AB and the mother is type O. What are the genotypes of...
Friday, September 16, 2011 at 12:52pm

Biology
Calculate the exact probability that when parents who are both heterozygous for a recessive disease have three children, the oldest will be affected, the middle one unaffected, and the youngest affected.
Thursday, September 15, 2011 at 9:57pm

Biology
A company seeks to develop an herbicide that kills plants by directly interfering (at the cellular level) with plants’ ability to maintain turgor pressure. An herbicide could accomplish this by disrupting the membrane of _____.
Thursday, September 15, 2011 at 9:35pm

Biology
Can someone please check my answers for the following 'choose the best answer'? Which of the following cellular functions would be most directly related to a malfunction of the Golgi apparatus? a)ATP production b)degradation of macromolecules c)secretion of proteins d)...
Thursday, September 15, 2011 at 3:34pm

biology
describe the events that take place in the eye when you come from a dark room to the outside where there is light
Thursday, September 15, 2011 at 4:00am

Biology
Can someone please check my answers for the following 'choose the best answer'? Which of the following cellular functions would be most directly related to a malfunction of the Golgi apparatus? a)ATP production b)degradation of macromolecules c)secretion of proteins d)...
Thursday, September 15, 2011 at 12:04am

Biology
Can someone please check my answers for the following 'choose the best answer'? Which of the following cellular functions would be most directly related to a malfunction of the Golgi apparatus? a)ATP production b)degradation of macromolecules c)secretion of proteins d)...
Wednesday, September 14, 2011 at 9:03pm

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