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July 28, 2015

Homework Help: Science: Biology

Recent Homework Questions About Biology

Statistical significance (Chi squared)
I just want to make sure what I'm calculating this right. The data I got for one time point are 6 and 23 I know the equation for chi^2 is Calculating Chi Squared - Catherine, Friday, October 28, 2011 at 8:15pm I did a biology experiment where I need to analyze the ...
Saturday, October 29, 2011 by Catherine

Biology
the biome with the fewest seasonal changes is?
Saturday, October 29, 2011 by Randy

English
1) Writeacher, I need the help of a science teacher to find a theme high-school students (aged 16 and 17) can investigate with their German and French partners. Our students study biology (also bilotechnologies) , chemistry, and earth science. 2) Can you check these two ...
Saturday, October 29, 2011 by Henry2

biology
I really need help i am so confued !! use the crossover values given to calculate the sequence and the distance apart of the genes indicated P-m 7% K-m 28% P-K 21% m-C 5%
Saturday, October 29, 2011 by Poppy

Biology
i really need help i am so stuck!! use the crossover values given to calculate the sequence and the distnace apart of the genes indicated p-m 7% K-M 28% p-k 21% m-C 5%
Friday, October 28, 2011 by Poppy

Biology 110
Displacement of O2 from its respiratory pigment: A. occur more rapidly in cold temp. B. occur more slowly when Ph alkaline. C. occur more slowly when O2 tissue level low. D. none of these.
Friday, October 28, 2011 by Susan Yi

Biology 110
True or false 1. Warm temp increase the release of CO2 from hemoglobin in the peripheral circulation. 2.Exchange of respiratory gases is by diffusion as a result of concentration gradient. 3. Residual air is necessary to maintain patent alveoli and prevent lung collapse.
Friday, October 28, 2011 by Susan Yi

Biology 110
by means of a chemical equation, show how the body rids itself of the major end-products of metabolism. Please explain.
Friday, October 28, 2011 by Susan Yi

Calculating Chi Squared
I did a biology experiment and I have to use the chi^2 method to calculate statistical significance. I got data at different time points and I just want to make sure what I'm calculating this right. The data I got for one time point are 6 and 23 I know the equation for ...
Friday, October 28, 2011 by Catherine

biology
what is the promoter sequence for transcription? in regards to nucleotides
Friday, October 28, 2011 by joe

biology
list two types of active transport that use specific protein recognition
Friday, October 28, 2011 by joe

biology
why is glucose converted into hexose bisphosphate in glycolysis ??
Friday, October 28, 2011 by Anonymous

biology 1
what kind of elecrtical charge is found on the oxygen atom of a polar water molecule
Friday, October 28, 2011 by mario

Biology
1) What is the minimum number of single nucleotide substitutions that would be necessary for each of the following amino acid replacements? a. trp -> lys b. met -> his c. tyr -> gly d. ala -> asp   2) A mutation is isolated that can not be induced to revert. ...
Friday, October 28, 2011 by Jim

Biology
Which of the following is not a benefit of genetic counseling: a.It helps identify parents at risk for having children with genetic defects. b.It assists parents in deciding whether or not to have children. c.It is based exclusively on family pedigrees. d.It helps identify ...
Friday, October 28, 2011 by Sam

Statistical significance
I did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light wavelength. Forthe ...
Friday, October 28, 2011 by Catherine

Statistical significance
I did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light wavelength. Forthe ...
Thursday, October 27, 2011 by Catherine

Statistical significance
I did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light wavelength. Forthe ...
Thursday, October 27, 2011 by Catherine

9th grade Biology
4. After the temperature reaches 33 degrees Celcius, the rate of photosynthesis declines. Using knowledge of enzymes, explain why this happens. 6. As the amound of CO2 increases, what would happen to the rate of photosynthesis? And as the amount of CO2 increases, would the ...
Thursday, October 27, 2011 by Madison

Biology
If a male's left vas deference is blocked. how is his sperm count affected? Explain you answer .. well wt i know is that the sperm count would decrease as less sperm moves from the epididyms into the urethra.
Thursday, October 27, 2011 by Mark J

Biology
What are the positive and negative impacts on biodiversity? I can't seem to find too much online. If you can give a short description of each it would be appreciated but not necessary!
Thursday, October 27, 2011 by Jill

Biology 110
Name the 4 functions of the respiratory system. 1. 2. 3. 4.
Wednesday, October 26, 2011 by Susan Yi

Biology 110
Jane is 28 yrs old dx with MS. Explain to her 10yrs old, what MS is, why, how, and when did it happen?
Wednesday, October 26, 2011 by Susan Yi

Biology 110
Jim has been stung by 35 bees and is going into anaphylactic shock. How is this happening; why is it happening; what can I do to help?
Wednesday, October 26, 2011 by Susan Yi

biology 110
name 4 functions of the nose.
Wednesday, October 26, 2011 by mike chi

biology
Name 4 functions of the respiratory system.
Wednesday, October 26, 2011 by sara may

biology
Jane is 28 yrs old dx with MS. Explain to her 10yrs old, what MS is, why, how, and when did it happen?
Wednesday, October 26, 2011 by sara may

biology
Jim has been stung by 35 bees and is going into anaphylactic shock. How is this happening; why is it happening; what can I do to help?
Wednesday, October 26, 2011 by Kim ki

biology
Name the 4 factors that control the amount and rate of gas exchange.
Wednesday, October 26, 2011 by Kim K

Biology
In guinea pigs, gene B is for black, b is for white the heterozygote is a mixture, called agouti. ( sex linked and non dominant) , a litter consists of 5 agouti females and 6 black males , if the parents of this litter had more offspring , what other phenotypes would you ...
Wednesday, October 26, 2011 by Melissa

Biology
In man, muscular dustrophy , is inherited as a sex linked recessive , a couple , both of whom are normal, have five children, three boys and two girls , the oldest boy is beginning to show symptoms of the disease, what could you tell them about the chances of their children ...
Wednesday, October 26, 2011 by Melissa

Biology
Suppose that a clolur blind man has parents with normal vision. Would all his sons be colour-blind ? Was his mother a carrier ? would all his daughters be carriers
Wednesday, October 26, 2011 by Melissa

Biology
My teacher asked me this question and I do not know the answer would you be able to tell me and why thank you large bodies loose a smaller percentage of heat to their surroundings than smaller bodies. Why?
Wednesday, October 26, 2011 by Ellie

Biology
What are the three reaction pathways which pyruvate undergoes in the metabolic pathways inside the cell and what are the names of the final products of each of these pathways?
Wednesday, October 26, 2011 by Tommy

biology
You are conducting an experiment to determine whether lichen populations are affected by local airborne pollutants. Which of the following observations would best support your hypothesis that high levels of airborne pollutants cause a reduction in lichen abundance: a) lichens ...
Tuesday, October 25, 2011 by candianon

Biology, Art
I was doing some research for a wildlife art contest in January and I can't seem to find a specific bit of information that is crucial to my painting. The contest requires me to paint a Greater Short Horned Lizard (Phrynosoma hernandesi) and I know that some species of ...
Monday, October 24, 2011 by Harley

Biology
Locate a diagram of an organism with the main organs and structures labeled. Locate a diagram of an organism with the main organs and structures labeled. Briefly explain how the organism in the diagram has evolved physiologically to become suited to its enviroment
Monday, October 24, 2011 by Max

Biology/math?
If ‘pi’ is approximately 3.14, and your field of view is 3 mm in diameter, what is the area of your field of view?
Monday, October 24, 2011 by Jill

Biology
Select two signal mechanisms that activate transcription in response to an external signal. Any of these systems ultimately activates a transcription factor. For each of the systems you have selected, trace the route from signal binding to receptor to the final transcription ...
Sunday, October 23, 2011 by M.C.Filth

biology
Someone has just given you the cDNA for GFP and you would like to design a construct that would result in GFP becoming resident within the ER. What would you do to this cDNA that would result in this final location. Explain.
Sunday, October 23, 2011 by M.C.Filth

biology
Would you expect the fraction of bacteria that are spontaneous rifampin resistant mutants to be higher or lower in a culture that: you had propagated many times or one you had just started from a single colony of sensitive bacteria? Why?
Sunday, October 23, 2011 by AKASHA

BIOLOGY
HOW COULD USING AQUACULTURES IMPACT THE BIODIVERSITY OF WILD FISH POPULATIONS?
Sunday, October 23, 2011 by VICTORIA

BIOLOGY
WHAT ARE TWO LEVELS OF BIODIVERSITY THAT WE FIND IN AN ECOSYSTEM?
Sunday, October 23, 2011 by VICTORIA

Biology
What is the difference between multiple gene inheritance and multiple allele inheritance
Sunday, October 23, 2011 by Kestrel

Biology
Explain how an individual can be a carrier for a oarticular disease yet not have the disase. Is this explanation true for all people who are carriers
Saturday, October 22, 2011 by Kestrel

biology
What are the major reservoirs of organic carbon on earth?
Friday, October 21, 2011 by Isles

biology
what questions do affected people, potential parents, and families face when a diagnosis of the sickle cell anemia is made
Thursday, October 20, 2011 by mas

English
I urgently need your help to translate this school profile into English. Thank you. I included another sentence, too. 1) Students aged between sixteen and eighteen can opt for the bilingual branch (??) and study subject like Geographie/Earth Science, biology and history in ...
Thursday, October 20, 2011 by Henry2

Biology
You are supposed to add 0.1 mol of a substance with molecular weight = 354.9 to 1 liter of water. How much should you add? Choose one.
Thursday, October 20, 2011 by Leanna

Biology
Difference between medukka and pyramid in a kidney?(:
Wednesday, October 19, 2011 by Izzy

Biology
Do plants make their own cell wall or is it already there ?
Wednesday, October 19, 2011 by Amy

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 by Ty

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 by Ty

Biology
What is Parkinson's & Alzheimer's disease? Explain each based on their causative agent,means of transsmission,prevention&control.
Wednesday, October 19, 2011 by Please help me...

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 by martini

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 by Nyo

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 by Akhil

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 by Melissa

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 by Akhil

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 by Akhil

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 by Mario Garcia

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 by Teddy

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 by Mario Garcia

Biology
Name all the structures that bile passes through (in order) from its creation to where it actually functions.
Monday, October 17, 2011 by Teddy

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 by Grace

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 by Grace

Biology
What is Ethology?
Monday, October 17, 2011 by Meron

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 by john

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 by Leanna

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 by Anonymous

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 by Bach

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 by layla

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 by Griselda

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

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 by p

Biology
What is the first step in replication?
Wednesday, October 12, 2011 by rachel

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 by Joanne

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 by Anonymous

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 by Simon

Biology
Why does Beta Glucose chains have more weak bonds between the chains than there are between alpha glucose chains?
Sunday, October 9, 2011 by Craig

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 by Sidney

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 by Sidney

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 by Joanne

biology
Are the categories animallike, plantlike, or funguslike useful in classifying protists? Please explain.
Saturday, October 8, 2011 by BOO!

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 by J Jackson

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 by J Jackson

Biology
Can DNA control how many teeth we will have?
Thursday, October 6, 2011 by Jennifer

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 by Izya

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 by jessica

biology
depict the following dilutions series: 1:4 1:16 1:64 IN A FINAL VOLUME OF 200ML
Wednesday, October 5, 2011 by shaknocka

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

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 by Neika

biology
what is grana?
Monday, October 3, 2011 by mary grace

biology
what is activation energy?
Monday, October 3, 2011 by jessica

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 by Jennifer

AP Biology
Why can't humans drink salt water for hydration?
Sunday, October 2, 2011 by Nicole

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 by BOO!

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 by Anonymous

Biology
explain the progression of the atmosphere from prebiotic to its current makeup
Sunday, October 2, 2011 by Catherine

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 by BOO!

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Homework Help: Science

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