Sunday
April 20, 2014

Homework Help: Science: Biology

Recent Homework Questions About Biology

Post a New Question | Current Questions

Biology
What is the significance of the different length: volume ratios of the digestive organs?
Wednesday, February 13, 2013 at 9:58pm

Biology
De nada!
Wednesday, February 13, 2013 at 8:47pm

Biology
Mucho gracias senora!!! :) me no speak english
Wednesday, February 13, 2013 at 8:46pm

Biology
http://www.google.com/search?q=3+domains​+and+the+kingdoms&hl=en&tbo=u&tbm=isch&s​ource=univ&sa=X&ei=2T4cUYLfPOiqyAHWmoGgA​Q&ved=0CD0QsAQ&biw=711&bih=453
Wednesday, February 13, 2013 at 8:34pm

Biology
list the 3 domains and the kingdoms included in each. please help me!!!! :) thanks
Wednesday, February 13, 2013 at 8:32pm

Biology
that girls my bestfriend..... you dont know know her like i do..
Wednesday, February 13, 2013 at 7:22pm

science
http://www.biology4kids.com/files/cell_v​acuole.html http://scienceforkids.kidipede.com/biolo​gy/cells/vacuoles.htm http://www.wordcentral.com/cgi-bin/stude​nt?book=Student&va=contractile%20vacuole​
Wednesday, February 13, 2013 at 6:51pm

SCIENCE Biology (urgent)
We do not do your homework for you. Although it might take more effort to do the work on your own, you will profit more from your effort. We will be happy to evaluate your work though.
Tuesday, February 12, 2013 at 12:05pm

SCIENCE Biology (urgent)
answer it with 2 paragraphs.. 1.How does chlamydia infect the human body? 2.What are the complications that can result from chlamydia infection? 3.What are the benefits of the CPAF inhibitor? 4.In what instances can control of endocycling be beneficial? 5.What are the ...
Tuesday, February 12, 2013 at 6:56am

Biology
They are conserved sequences, and they both bind proteins to initiate the synthesis of a strand. However, the strands that they initiate synthesis of are different, as well as the proteins that they bind. DNA polymerase binds at the Replication Origin and initiates the copying...
Monday, February 11, 2013 at 4:36am

Biology
DNA synthesis starts at the Replication Origin. In what way(s) do you think that the Replication Origin might be similar to a Promoter and in what ways might it be different?
Sunday, February 10, 2013 at 10:34pm

Biology
Inducible
Sunday, February 10, 2013 at 10:15pm

Biology
Inducible
Sunday, February 10, 2013 at 10:15pm

philosophy
Ideas: The history of hospitals Services performed for free The advantages of a healthy population The rise of knowledge about biology Inventions that became medically useful, even though the inventor had no interest in medicine,(the MRI happened this way).
Sunday, February 10, 2013 at 8:29am

Biology
They are different from each other. read the articles, you need a different answer for each
Sunday, February 10, 2013 at 6:12am

biology help!!
Posted my help in another post.
Sunday, February 10, 2013 at 12:49am

biology (cell bio)
Not a problem. Just beware of my typos; F= Faraday's constant, not equation.
Sunday, February 10, 2013 at 12:44am

biology
I posted my help in another post. I am not on here all of the time. I just have some free time and go on this forum_search_20140419 to engage my mind in science. However, when I do come on and I think I can help then I will. But I am not one of Jishka's experts.
Sunday, February 10, 2013 at 12:37am

biology (confused)
Check previous post!!!!!
Sunday, February 10, 2013 at 12:32am

biology
Okay, I followed the same format for your other post, but I am not so sure since I haven't done research requiring some of the concepts and/or have only taken one class concerning some of the topics. But I am pretty sure that the one's that I wasn't sure about are ...
Sunday, February 10, 2013 at 12:30am

biology
1. The phenomenon of autocatalysis is involved in a positive feedback loop that activates certain digestive enzymes. Which likely results when the digestive enzymes are activated? a.)the suppression of other enzymes b.)additional enzyme activation c.)a chemical that blocks ...
Saturday, February 9, 2013 at 11:14pm

biology
Thank you soo much. Will you be willing to help me with some more questions?
Saturday, February 9, 2013 at 11:07pm

biology (cell bio)
Awesome, that makes much more sense. Thank you! My book was rather hard to follow in this section.
Saturday, February 9, 2013 at 9:11pm

biology (confused)
Hi Will someone please check my answers. I went to biology-forum_search_20140419s(dot)com and registered but i really don't know how to post my questions and i really need help (with the questions). Thanks in advance. 1. Which process involves both passive and active ...
Saturday, February 9, 2013 at 9:10pm

biology (cell bio)
The Nernst equation is just used to measure the electrical potential, for the purposes of cell bio, it is used to measure the electrical potential of ions across the cell membrane. The Nernst equation can be written as followed: E=(RT/zF)ln([K+]o/[K+]i) [K+]i=ion concentration...
Saturday, February 9, 2013 at 8:58pm

biology (cell bio)
Can someone explain the Nernst Equation and its purpose, in as simple terms as possible? For some reason it's just not clicking with me. Thanks!
Saturday, February 9, 2013 at 8:34pm

biology help!!
Please check my answers. I did my best. 1. Which process involves both passive and active transport? a.)facilitated diffusion<---- b.)cotransport c.)bulk transport d.)transport through electrogenic pumps e.)osmosis 2. How does the liver in a healthy body respond to elevated...
Saturday, February 9, 2013 at 7:33pm

biology
Please check my answers. I did my best. 1. Which process involves both passive and active transport? a.)facilitated diffusion<---- b.)cotransport c.)bulk transport d.)transport through electrogenic pumps e.)osmosis 2. How does the liver in a healthy body respond to elevated...
Saturday, February 9, 2013 at 6:20pm

Biology
so they belong in the plantae kingdom or plant kingdom?
Saturday, February 9, 2013 at 2:54pm

Biology
http://en.wikipedia.org/wiki/Fucus_vesic​ulosus
Saturday, February 9, 2013 at 2:48pm

Biology
http://en.wikipedia.org/wiki/Opalina http://en.wikipedia.org/wiki/Ascophyllum​_nodosum
Saturday, February 9, 2013 at 2:47pm

Biology
what kingdom does opalina belong to? and... what kingdom does rockweed belong to?
Saturday, February 9, 2013 at 2:37pm

biology
If I disagreed with an answer, I deleted all the answer choices and left a note explaining why for all but one. I also left a note in ******* for some of the answer choices. Best of luck!!!!!!!!!! 1. Which process results in an individual inheriting the incorrect number of ...
Saturday, February 9, 2013 at 2:08am

biology
Will someone please check my answers? 1. Which process results in an individual inheriting the incorrect number of chromosomes? a.)mutation b.)nondisjunction<-- c.)segregation error d.)duplication error e.)linkage 2. Which data in Hershey and Chase's experiment ...
Friday, February 8, 2013 at 11:34pm

Biology
Myosin and actin are proteins that make up microfilaments for muscle contractions; not sure I understand the question.
Friday, February 8, 2013 at 9:34pm

biology
Isn't his poor nutrition an environmental influence on his genes?
Friday, February 8, 2013 at 12:46pm

biology
a boy inherits genes for tallness,but his growth is limited as a result of poor nitrition. this is an example of 1)an inherited disorder. 2)environmental influence on gene expression . 3)expression of a hidden trait 4)a characterstic controlled by more than one pair of genes. ...
Friday, February 8, 2013 at 12:44pm

Biology-typo
The fourth line from the bottom should say Since the genotypic frequency for Tt is 0.38, the NUMBER of clams heterozygous for the Tt in the population is 0.38*(953)=362
Friday, February 8, 2013 at 6:18am

Biology/Endocrinology
Cheif cells in the stomach secrete pepsinogen, the zymogen precursor to pepsin. The pH of the stomach activates pepsin and also plays a role in the breakdown of proteins by causing denaturation. Large proteins are broken down to smaller proteins by pepsin, and are moved to the...
Friday, February 8, 2013 at 6:15am

Biology
A negative effect of indirect artificial selection is that it can reduce genetic diversity by eliminating alternate alleles for desired traits and, indirectly, for many of the linked traits.
Friday, February 8, 2013 at 2:55am

Biology
TT+Tt= Phenotypic frequencies for tan tt=Phenotypic frequency for pink 557/(557+396)=Phenotypic frequency for tan=0.58 1-0.58=Phenotypic/genotypic frequency for pink=0.42 (T+t)^2=TT+2Tt+tt=1 Plugging in 0.42 for the genotypic frequency for pink in the above equation, TT+2Tt+0....
Friday, February 8, 2013 at 2:32am

Biology
What is one negative effect of indirect artificial selection?
Friday, February 8, 2013 at 2:10am

Biology Difference b/w Heat Exhaustion/Heat Stroke
I want to know the causes of heat stroke and heat exhaustion. I cant seem to find separate causes for the two, finding very different answers online :|
Friday, February 8, 2013 at 12:53am

Biology
You are studying a large population of claims of which 396 are pink (t) and 557 are Tan (T). Tan clams are completely dominant over pink clams. Calculate the following: 1. The frequencies of each allele. 2. The expected genotypic frequencies. 3. The number of heterozygous ...
Thursday, February 7, 2013 at 11:37pm

biology
As Bobpursley said -- Hmmmm.
Thursday, February 7, 2013 at 8:36pm

biology
JANUARY 2009. This graph represents hormons and events in the 1.process of fetal growth and development. 2.process of meiotic cell divission during sperm dev elopment. 3.reproductive cycle of males. 4.reproductive cycle of females. i have to choose one of them what is the ...
Thursday, February 7, 2013 at 8:34pm

biology? incomplete
No graph shown.
Thursday, February 7, 2013 at 8:21pm

Biology
Hey I am doing a lab, the link is down h t t p : //w w w . sd67 . bc . ca/schools/salc/biology%2012/module%20c%​20-%20human%20biology/unit%2010%20-%20re​spiratory%20system/Homeostasis%20Lab .pdf And I really would like help with #1 My data is right here Pre ...
Thursday, February 7, 2013 at 7:53pm

health
http://biology.about.com/od/anatomy/ss/a​rtery.htm
Thursday, February 7, 2013 at 7:29pm

Biology
Remember, the 0.36 that wal calculated for the phenotype frequency of bb is the same as the genotype frequency.
Thursday, February 7, 2013 at 3:30am

Biology
B+b=1, (B+b)^2=BB+2Bb+bb=1 genotype BB=Big ears genotype Bb=Big ears genotype bb=Stubby ears Since each rabbit has two alleles for ear type, 525*2=1,050 total alleles Since 189 rabbits have the genotype bb, 189/525= 0.36, the phenotype frequency for stubby ears. This means ...
Thursday, February 7, 2013 at 3:25am

Biology
1. 525 jackrabbits in the desert. Big ears (B) are dominant among jackrabbits, while stubby ears (b) are recessive. Of the study of this population, 189 rabbits have stubby ears. Calculate: 1.The frequency of the "bb" genotype 2.The frequency of the "b" ...
Wednesday, February 6, 2013 at 11:35pm

General Biology
There is only one bag potato chips left on the planet Earth. Ed and Trina have found it on the far side of ‘look out’ mountain with 2 grams of water inside the bag. The chips were soggy. Until another source of nutrients has been discovered they must share this bag ...
Wednesday, February 6, 2013 at 7:01pm

Biology....someone who can explain something to me
thank you Devron
Wednesday, February 6, 2013 at 8:32am

biology
Since this is not my area of expertise, I searched Google under the key words "chromosomes cell division stages" to get these possible sources: http://www.google.com/search?client=safa​ri&rls=en&q=chromosomes+cell+division+st​ages&ie=UTF-8&oe=UTF-8 In the...
Tuesday, February 5, 2013 at 11:45am

Biology
True
Tuesday, February 5, 2013 at 10:33am

Biology....someone who can explain something to me
The Miller and Urey experiment is an experiment that mimicked the conditions on earth before evolution took place. They made an atmosphere that contained water, H2, methane, and ammonia which are believed to be abundant in the earth's atmosphere before evolution. The ...
Tuesday, February 5, 2013 at 9:51am

Biology....someone who can explain something to me
can someone explain the Miller-Urey Experiment to me? I've read it again and again and I just don't really get it. Please help me out here.
Tuesday, February 5, 2013 at 9:08am

biology
I totally screwed up on the calculations. The concentration of NaCl in solution A is 50 x 10^-3L*(50mM)=0.250 moles of NaCl The concentration of NaCl in solution B is 100 x10^-3L*(100mM)=10 moles of NaCl
Tuesday, February 5, 2013 at 6:42am

biology
Also, the concentration of NaCl in solution B is 100mL*(100mM)=10,000 moles of NaCl TOTAL not 1,000 moles
Tuesday, February 5, 2013 at 2:03am

biology
I have a typo The concentration of NaCl in solution A is 50mL*(50mM)=250 moles of NaCl TOTAL not per mL The concentration of NaCl in solution B is 100mL*(100mM)=1,000 moles of NaCl TOTAL not per mL
Tuesday, February 5, 2013 at 1:54am

biology
The concentration of NaCl in solution A is 50mL*(50mM)=250 moles of NaCl per mL The concentration of NaCl in solution B is 100mL*(100mM)=1,000 moles of NaCl per mL a) Describe and explain which way the water and the Na+ and Cl- ions would flow? The ions would flow from ...
Tuesday, February 5, 2013 at 1:49am

biology
7. Imagine you have 2 chambers connected by a flexible, semipermeable membrane and completely filled with solutions - one chamber contains 50ml of a 50mM NaCl solution (A), and the other (B) contains 100 ml of a 100mM NaCl solution? If the membrane permits both water and NaCl ...
Tuesday, February 5, 2013 at 12:41am

biology
hahaha oh no you dont cheater... this is YOUR hw for a reason :p
Monday, February 4, 2013 at 3:04pm

Biology...
A have experience in biology, but not in physiology. However, I do remember that anterior refers to front and posterior refers to the back. Also, superior refers to the top and inferior refers to the bottom. I hope this is some kind of assistance.
Monday, February 4, 2013 at 5:47am

Biology
The process is a description of osmosis, which is the movement of solvent/water to places where solute concentrations are low to where solute concentrations are high to establish an equal concentration gradient across the membrane. a) distilled water? (describe the volume ...
Monday, February 4, 2013 at 5:24am

Biology
6. Describe and explain what would happen to a cell containing 100mM NaCl, 150 mM glucose, and 100 mM protein if placed into: a) distilled water? (describe the volume change if the cell were permeable to water only). b) a solution of 100mM NaCl, IF the cell were permeable to ...
Monday, February 4, 2013 at 12:24am

Biology...
1. References are made by the anatomist to the front,back,head and tail of the body. What anatomical reference terms are used to describe each of these directions? My answer: anterior, posterior, I am not sure with head and tail Is it superior and inferior?? 2. A person lying ...
Sunday, February 3, 2013 at 7:36pm

biology
http://www.google.com/search?q=DNA+ladde​r&hl=en&tbo=u&tbm=isch&source=univ&sa=X&​ei=G7IOUYOHHZKPyAGb24CoDQ&ved=0CD0QsAQ&b​iw=711&bih=453
Sunday, February 3, 2013 at 1:53pm

biology
How to make structure of DNA ladder like
Sunday, February 3, 2013 at 1:41pm

biology
I'm glad you could help, Devron!
Saturday, February 2, 2013 at 12:00pm

biology help plz?????????????????
thanks for ur help
Saturday, February 2, 2013 at 11:33am

biology help plz?????????????????
thanks
Saturday, February 2, 2013 at 11:23am

biology
There are several recessive disorders carried on the X chromosome (X-linked genes). Women may have a dominant normal gene on the other X chromosome to prevent the disorder from showing up in the phenotype. There would be no such dominant gene for males. Although more males are...
Saturday, February 2, 2013 at 11:06am

biology help plz?????????????????
I am not Jiskha's bio expert, but I have a little bit of experience in the area.
Saturday, February 2, 2013 at 10:53am

biology help plz?????????????????
I am not Jiskha's bio expert, but I have a little bit of experience in the area. I hope this helps.
Saturday, February 2, 2013 at 10:51am

biology help plz?????????????????
Products of oxidative phosphorylation are ATP, water, and NAD. Its actually three not two. Oxygen is the final electron acceptor in oxidative phosphorylation and it is converted to water; protons are passed from NADH to form NAD+; and those protons are passed through the ...
Saturday, February 2, 2013 at 10:48am

biology help plz?????????????????
Original mRNA strand: AUG UGU AAU GGG Mutated mRNA strand:AUG UA*U AAU GGG *mutated RNA base Original polypeptide: 1.Met 2.Cys 3.Asn 4.Gly Mutated ploypeptide: 1.Met 2.Tyr 3.Asn 4.Gly
Saturday, February 2, 2013 at 10:29am

Biology
Since Jiskha doesn't have a biology expert at this time, please try posting your question at this site. http://www.biology-online.org/biology-fo​rum_search_20140419/
Saturday, February 2, 2013 at 9:55am

Biology
Since Jiskha doesn't have a biology expert at this time, please try posting your question at this site. http://www.biology-online.org/biology-fo​rum_search_20140419/
Saturday, February 2, 2013 at 9:54am

biology help plz?????????????????
product of The oxidative phosphorylation / electron transport is ? in stage of glucose oxidation a)pyruvate b)oxygen c)water d)NAD e)ATP f)NAD.2H g)carbon dioxide h)ADP CHOSE TWO ANSWER FROM THE FOLLOWING LIST product of Glycolysis is? a)pyruvate b)oxygen c)water d)NAD e)ATP f...
Saturday, February 2, 2013 at 9:51am

biology help plz?????????????????
the mRNA squence below is shown along with the polypeptide which would be produced when it is translated .what polypeptide would be produced if the fifth base in the mRNA sequence shown had been changed to A as result of a mutation in the DNA from which the mRNA wa transcribed...
Saturday, February 2, 2013 at 9:26am

biology
What is the scientific reason to the larger population of females than males in countries in relation to chromosomes?
Saturday, February 2, 2013 at 3:32am

Biology
It's A
Friday, February 1, 2013 at 12:59pm

biology
List any five anatomical differences between monocot root and dicot root.
Friday, February 1, 2013 at 2:23am

biology
property of muscle in which the strength of its contraction can vary from weak to strong
Thursday, January 31, 2013 at 2:24am

biology
nerve fiber control over muscle or gland effector activity
Thursday, January 31, 2013 at 1:58am

Biology
Thank you
Wednesday, January 30, 2013 at 8:11pm

Biology
Monohybrid cross
Wednesday, January 30, 2013 at 8:08pm

Biology
What is a cross between plants that involves one characteristic called
Wednesday, January 30, 2013 at 7:55pm

Biology
I would guess C. Both are aerobic.
Tuesday, January 29, 2013 at 11:27pm

biology
Gastrulation geometrically separates the future ectoderm, from what?
Tuesday, January 29, 2013 at 10:13pm

chemstry
This is not chemistry but immunology/biology. The HIV virus is what microbiologists/immunologists classify as an RNA virus. RNA viruses are not like DNA viruses because they use their RNA transcript to infect cells, namely helper t-cells. Helper t-cells are a type of white ...
Tuesday, January 29, 2013 at 3:32pm

biology college
which leukocyte is predominant in the blodd smear?explain by comparing it with other leukocytes and red blood cells in the blood smea
Tuesday, January 29, 2013 at 8:56am

Biochemistry, Biology, Chemistry
The Km is just a measure of the dissociation of the enzyme.
Monday, January 28, 2013 at 8:33pm

Biology
I had to think about your question for a bit. Usually, you add a strong base to see an increase in the pH for a titration, but in this experiment you added a strong acid and saw an increase in the pH; this should not have been the case. It seems as though you were adding a ...
Monday, January 28, 2013 at 8:29pm

Biology
Your going to have to take a look at a titration curve to understand what you did. But providing your data may allow someone to give you a better answer.
Monday, January 28, 2013 at 6:10pm

Biology
The number of generations shouldn't affect the the genotype frequencies. the first thing to do is calculate allele frequencies, which is 0.7 for B and .3 for b. B+b=1=allele frequencies Since in the parental generation there are 49 individuals with the genotype BB, 42 ...
Monday, January 28, 2013 at 5:54pm

Biology
In a population of jaguars, a gene with two alleles encodes the fur color. Allele B causes melanism (dark fur) and is dominant over allele b, which results in light colored fur. Suppose that there is a migration event, producing a population with 60% BB, 20% Bb and 20% bb ...
Monday, January 28, 2013 at 2:43pm

Biology
In a lab experiment, we experimented with 1% glucose solution and Sorenson's solution to determine pH levels and whatnot; the other part of the lab was to determine which one, if either, was a buffering solution. According to the notes my instructor gave us, a buffers are ...
Monday, January 28, 2013 at 1:10pm

Pages: <<Prev | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | Next>>

Post a New Question | Current Questions

Homework Help: Science

Search
Members