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April 16, 2014

Homework Help: Science: Biology

Recent Homework Questions About Biology

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biology
what is the difference between plant and animal cell
Tuesday, March 12, 2013 at 5:49am

math
Total # of students = 200 Biology students = 36 Spanish students = 52 Other students = 126 36+52+126 does not even = 200 students total Did you type this question incorrectly?
Tuesday, March 12, 2013 at 4:58am

math
In a group of 200 high school students, 36 are taking biology, 52 are taking Spanish, and 126 are taking neither biology nor Spanish. If one of these 200 students is to be chosen at random, what is the probability that the student chosen is taking biology but not Spanish?
Tuesday, March 12, 2013 at 4:10am

biology
http://en.wikipedia.org/wiki/Deep_time
Monday, March 11, 2013 at 10:51pm

biology
what is deep time?
Monday, March 11, 2013 at 10:48pm

Biology
A series of laboratory experiments are set up to investigate various aspects of the photosynthetic process in Elodea canadensis, a common species of pond weed which lives underwater. In the experiment a fixed quantity of Elodea canadensis is incubated underneath an inverted ...
Monday, March 11, 2013 at 9:17pm

English
I wonder if Mother is, or is forced to be, a bit too self-sacrificing and too patient. I am having trouble with Anne's lack of respect to Edith either as a person or as a Mother. When Otto scolds Anne for her reproaching letter, Anne has genuine regrets. She feels ashamed ...
Monday, March 11, 2013 at 4:21pm

English
I wonder if Mother is, or is forced to be, a bit too self-sacrificing and too patient. I am having trouble with Anne's lack of respect to Edith either as a person or as a Mother. When Otto scolds Anne for her reproaching letter, Anne has genuine regrets. She feels ashamed ...
Monday, March 11, 2013 at 4:20pm

biology
Less water flowing into it, which can change the mineral and salt composition of the water, cause changes in flow and temperature, and these in turn can dramatically change the types of plant and animal life in the area. Of course, this is a moot point because virtually all ...
Monday, March 11, 2013 at 2:30pm

science
http://www.biology.arizona.edu/biomath/t​utorials/applications/cooling.html
Monday, March 11, 2013 at 11:49am

Biology
For (A) substitute the hydroxyl-groups with H and the amino-group with a methyl-group For (C) substitute the hydroxyl-groups with chloride For (D) Chloride
Monday, March 11, 2013 at 11:40am

biology
How might the damming of an river affect an estuary at the river's mouth
Monday, March 11, 2013 at 10:47am

Biology
A golgi body is used to package proteins and lipids into vesicles for transport, so it's probably a cell that produces proteins or lipids or both.
Sunday, March 10, 2013 at 10:22pm

Biology
Given that a cell's structure reflects its function, what function would you predict for a cell with a large Golgi apparatus?
Sunday, March 10, 2013 at 8:24pm

ap biology
nucleus
Sunday, March 10, 2013 at 3:16pm

biology help?
i second anonymous and would also like to add that this breaks the plagerism clause of the course...
Saturday, March 9, 2013 at 4:24am

Biology/Physiology needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
Friday, March 8, 2013 at 1:30pm

Biology (incomplete)
What are you describing?
Friday, March 8, 2013 at 1:08pm

Biology
Describe one benefit of the transpiration stream of a plant:
Friday, March 8, 2013 at 5:12am

biology
Dopamine is a neurotransmitter—a chemical released by nerve cells to send signals to other nerve cells. Activities like sex and gambling increase the levels of dopamine released within the brain. The highly addictive drugs cocaine and methamphetamine mimic the effects of ...
Friday, March 8, 2013 at 5:11am

Biology
Mature phloem is a live tissue,whereas xylem is dead when mature.Explain why it is necessary for phloem to be alive to be functional,whereas xylem can function as dead tissue:
Friday, March 8, 2013 at 4:07am

Biology
Explain why a plant needs to move food around,particularly from the leaves to other regions:
Friday, March 8, 2013 at 4:03am

Biology
Explain what is meant by source to sink flow in phloem transport.
Friday, March 8, 2013 at 4:01am

Biology
Functions Store information Copy information Transmit information What is the structure of each molecule
Thursday, March 7, 2013 at 8:53pm

Biology
If the original amount of Carbon-14 is 142 kilograms, how much will the sample weight in 11,400 years?
Thursday, March 7, 2013 at 8:30pm

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/
Thursday, March 7, 2013 at 10:58am

Biology
Dopamine is a neurotransmitter—a chemical released by nerve cells to send signals to other nerve cells. Activities like sex and gambling increase the levels of dopamine released within the brain. The highly addictive drugs cocaine and methamphetamine mimic the effects of...
Thursday, March 7, 2013 at 10:08am

Biology
Which of the following bond types is Testosterone capable of forming with a suitable partner molecule? Indicate your answer by checking "Yes" or "No" as appropriate. Hydrogen Bond Ionic Bond van der Waals forces As a whole, is the Testosterone molecule: - ...
Thursday, March 7, 2013 at 9:51am

Biology
Muscle are made up of muscle functions called____ ____. Its two words... I was thinking myosin and actin , however, not sure if i AM CORRECT.
Thursday, March 7, 2013 at 2:51am

Biology
population
Wednesday, March 6, 2013 at 8:20pm

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/
Wednesday, March 6, 2013 at 7:28pm

Biology
all members of a particular species that live in the same area are called.... plz help me i think the answers is population.. is that right??????
Wednesday, March 6, 2013 at 7:13pm

Biology
Volume of RBCs in venous circulation increased by 3% than than of RBCs in arterial circulation, why?
Wednesday, March 6, 2013 at 2:04am

General Biology
It seems that you are talking about Darwin's,"survival of the fittest" concept.
Tuesday, March 5, 2013 at 9:21pm

biology
thx
Tuesday, March 5, 2013 at 5:21pm

biology
Homeostasis is stability with the body's processes. Disease disturbs the body's stability. Diabetes is one example. Can you think of others?
Tuesday, March 5, 2013 at 4:33pm

General Biology
What are your choices? What is your answer.
Tuesday, March 5, 2013 at 2:08pm

General Biology
Darwin used which of the following terms to describe the process by which those individuals that possess superior physical, behavioral, or other attributes are more likely to pass their traits to the next generation?
Tuesday, March 5, 2013 at 2:07pm

biology
I nead a list of diseases thats a failure to homeostasis.
Tuesday, March 5, 2013 at 7:58am

biology
that a negative emonrvinent (yelling. depression, darkness) inhibits growth while a positive one (talking to thep plants) helps it. Keep all the variables the same except the emonrvinent. Use a neutral emonrvinent as your middle ground and and study how this may affect the ...
Tuesday, March 5, 2013 at 2:08am

Biology
Nvm forget thr 3rd question:) its circulatory right?
Monday, March 4, 2013 at 10:25am

Biology
1-how do the parts of the respiratory system worj togather? 2-how does the respiratory system work with other body systems? 3- which body system helps Respiratory system bring oxygen to body? A- circulatory B- excretory C- digestive D- muscular
Monday, March 4, 2013 at 10:15am

biology
A- crenation B- hemolysis C- hemolysis D- crenation E- creantion
Saturday, March 2, 2013 at 11:51pm

biology
Density=mass/volume, solve for mass Density of NaHCO3=2.20 g/mL
Saturday, March 2, 2013 at 10:18pm

biology
it is possible that he would be homozygous but not ccertain because some males have an extra chromosome foe example : the normal male has "XY" and another male may have "XXY" which means its possible for a male to be heterozygous but its not common. Now if ...
Saturday, March 2, 2013 at 7:53pm

Biology
Similarities: 1. Required for all living organisms. 2. Uses oxygen. Differences: 1. Breathing: takes in oxygen (expels carbon dioxide). Respiration: breaks down oxygen so cells can use it. 2. Breathing: physical process Respiration: chemical process
Saturday, March 2, 2013 at 6:30pm

biology
for a lab it says prepare a 300 ml of .2% sodium bicarbonate solution. I am trying to find how many grams of NaHCO3 i need. so i did 300ml X .002 and got .6ml of NaHCO3. but how do I convert that to grams of NaHCO3
Saturday, March 2, 2013 at 2:37pm

Biology
Distinguish between breathing and respiration , i wrote: Breathing is the process of taking in oxygen and eliminating carbon dioxide. Respiration is the breakdown of oxygen in the body- although both are needed for all living organisms Is this true? If not may you please fix ...
Saturday, March 2, 2013 at 12:44pm

biology
Think of diets from an energy perspective. Where is the energy coming from, and how many organisms does it move through before it gets to the human? In what form is most of the energy in when it gets to the human, and how is that energy unleashed by the body?
Friday, March 1, 2013 at 8:46pm

biology
Apply the Law of Conservation of Energy to food. Trace the energy from its beginning point, to the point where it was stored or used.
Friday, March 1, 2013 at 8:45pm

biology
Apply the concept of RESPIRATION. What happens inside of a human being when he or she eats various foods? During Respiration, is the energy in the food converted into heat, or into some other chemical (name the chemical!)
Friday, March 1, 2013 at 8:43pm

BIOLOGY
The gastrointestinal phase of gastric secretion:? a. is controlled by the entrance of acidic chyme into the duodenum. b. leads to increased gastric secretion if duodenal pH falls below 2. c. only stimulates gastric secretion. d. will decrease gastric secretion when gastrin is ...
Friday, March 1, 2013 at 4:29pm

biology
Use google.
Friday, March 1, 2013 at 10:07am

biology
In anaphase I and II, the chromatid counts are the same (2n), but in telophase II the chromatid count is n. Pick a number for n.
Friday, March 1, 2013 at 10:07am

Science/biology
Google this.
Friday, March 1, 2013 at 10:01am

biology
It is believed that are used for stability during transcription of the mRNA transcript, but scientist are not sure. But they are spliced out with introns after exons are joined together.
Friday, March 1, 2013 at 10:00am

Biology
Already answered in your other post.
Friday, March 1, 2013 at 9:53am

Biology
The mitochondria evolved in eukaryotic cells from a symbiotic relationship with prokaryotic cells; prokaryotic cells do not have a mitochondria because in a sense, they are mitochondria. Prokaryotic cells divide by binary fission, which is similar to mitosis. However, ...
Friday, March 1, 2013 at 9:53am

Biology
Why mitochondrion and mitotic division are absent in prokaryotic cells?
Friday, March 1, 2013 at 2:11am

Biology
Why mitochondrion and mitotic division are absent in prokaryotic cells?
Friday, March 1, 2013 at 2:11am

biology
You're in Mr. Moyer's Bio 205 class at WWU? If you check out page 317 of our book it really helps! "The bulk of the human genome is made of non-coding and repetitive nucleotide sequences" or junk. Hope that helps! Good luck tomorrow :)
Friday, March 1, 2013 at 1:00am

biology
You're in Mr. Moyer's Bio 205 class at WWU? If you check out page 317 of our book it really helps! "The bulk of the human genome is made of non-coding and repetitive nucleotide sequences" or junk. Hope that helps! Good luck tomorrow :)
Friday, March 1, 2013 at 12:59am

biology
what happens to the UTR during RNA processing?
Thursday, February 28, 2013 at 10:12pm

biology
What do multicellular genomes spend a larger proportion of their sequences on (in terms of enhanced complexity)?
Thursday, February 28, 2013 at 10:11pm

biology
what specific stage during the cell cycle does random fertilization occur?
Thursday, February 28, 2013 at 10:11pm

biology
What is the ploidy (haploid/diploid) level and how many sister chromatids are there in your own cells during anphase I, anaphase II, and telophase II (includes cytokinesis)?
Thursday, February 28, 2013 at 10:10pm

biology
Briefly describe the structure and function of three different cellular systems that combine proteins along with necessary RNAs to catalyze covalent bond formation and/or hydrolysis reactions (i.e., function as ribozymes)?
Thursday, February 28, 2013 at 10:09pm

biology
Yes, but when you do theses Hardy-Weinberg problems you are suppose to let the recessive gene equal p and the autosomal dominant gene equal q. When I started doing this for you I accidentally switched it, but the numbers are correct. The post should read Let p=sickle cell and ...
Thursday, February 28, 2013 at 7:50pm

biology help plz?????????????????
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/
Thursday, February 28, 2013 at 9:34am

biology help plz?????????????????
Complete the following paragraph relating to the enzyme, β–galactosidase. This enzyme hydrolyses the disaccharide lactose to constituent monosaccharides, galactose and glucose. Drag and drop the appropriate words into the correct space. For white spaces in the ...
Thursday, February 28, 2013 at 9:11am

biology
thanks! so the heterozygous and homozygous dominant genotypes are p^2 and 2pq?
Thursday, February 28, 2013 at 6:17am

biology
Sickle cell anemia is autosomal dominant. Let p=sickle cell and q=normal cell. p+q=1 (p+q)^2=p^2+2pq+q^2=1 p^2= homozygous dominant q^2=sickle cell 2pq=heterozygous For Central Africa 0.1=q^2=sickle cell q=0.316 p=1-0.316=0.684 p^2= homozygous dominant=(0.684)^2=0.468 q^2=...
Thursday, February 28, 2013 at 12:34am

biology
how do i do this?
Wednesday, February 27, 2013 at 8:22pm

biology
The frequency of the sickle cell disease in parts of Central Africa is as high as 10 percent compared to a frequency of .5 percent in the US. Use the percentages for the Central Africa population and the US population to calculate the frequency of the heterozygous and ...
Wednesday, February 27, 2013 at 8:22pm

Biology
You are begging to get yourself banned! Do NOT post only answers on other students' posts. They learn nothing from that.
Wednesday, February 27, 2013 at 11:55am

Biology
When does DNA synthesis occur???
Wednesday, February 27, 2013 at 11:37am

biology
what characteristics appear to show consistent development over the 4 million years of hominid evolution?
Tuesday, February 26, 2013 at 10:12pm

Biology
There is a specific fossilization process for every creature, mostly likely the sand didn't settle as quickly as necessary for the fossil to become sediment.
Tuesday, February 26, 2013 at 6:14pm

Biology
When cells increase in size, the surface area to volume ratio decreases. But which surface area to volume ratio is better to the cell as well as to the organism? The larger or smaller ratio?
Tuesday, February 26, 2013 at 2:10am

Biology
I think B. Plutonium is radioactive. A mutation that changes a single base in a region of noncoding DNA would not have any or would have minimum effect on a cell. And most of the stuff that living beings consume are carbon based.
Monday, February 25, 2013 at 10:51pm

Biology
Which of the following mutations would you expect to have the greatest effect on a living cell? A. A mutation that changes a single base in a region of noncoding DNA B. Energy release from plutonium C. Consumptions of preexisting organic compounds Im clueless!!!
Monday, February 25, 2013 at 10:41pm

biology
Why are the subclavian vein and subclavian artery positioned where they are relative to each other?
Monday, February 25, 2013 at 6:27pm

finance
You have chosen biology as your college major because you would like to be a medical doctor. However, you find that the probability of being accepted to medical school is about 6 percent. If you are accepted to medical school, then your starting salary when you graduate will ...
Monday, February 25, 2013 at 3:55pm

Biology
Most likely the one with the most descendants. Evolutionary science generally deals with the passing on of genes, and that frog would have reproduced the most and would therefore have been the most successful.
Sunday, February 24, 2013 at 9:50pm

Biology
The mice would be half heterozygous for black, and half white.
Sunday, February 24, 2013 at 9:47pm

biology
In a chorus of male frogs of one species, which would be considered by evolutionary biologists to be the fittest? The biggest frog. The frog that has the most descendants. The frog with the largest territory. The loudest frog. The frog that attracts the most females. I am ...
Sunday, February 24, 2013 at 9:46pm

biology urgent
In mice, a gene controlling coat colour has 2 alleles; B (black) and b (white). A pure breeding black mouse is crossed to a white mouse and all the offspring are black. The offspring are then crossed to white mice. The phenotypes of the offspring of this second cross are ...
Sunday, February 24, 2013 at 9:39pm

Biology
Which of the following mutations would you expect to have the greatest effect on a living cell? A. A mutation that changes a single base in a region of noncoding DNA B. Energy release from plutonium C. Consumptions of preexisting organic compounds
Sunday, February 24, 2013 at 8:53pm

Biology
Which of the following mutations would you expect to have the greatest effect on a living cell? A. A mutation that changes a single base in a region of noncoding DNA B. Energy release from plutonium C. Consumptions of preexisting organic compounds Im clueless!!!
Sunday, February 24, 2013 at 5:25pm

biology
Describe human dispersal, animal dispersal- eating, hook on fur and bursting. Also how they are adapted.
Sunday, February 24, 2013 at 2:57pm

biology
oh, a snail and Elodea
Sunday, February 24, 2013 at 12:22pm

biology (incomplete)
What organisms?
Sunday, February 24, 2013 at 12:00pm

biology
Since this is not my area of expertise, I searched Google under the key words "Aquarium plants snails" to get these possible sources: http://www.google.com/search?client=safa​ri&rls=en&q=aquarium+plants+snails&ie=UT​F-8&oe=UTF-8 In the future, you can ...
Sunday, February 24, 2013 at 11:59am

biology
Since this is not my area of expertise, I searched Google under the key words "Aquarium plants snails" to get these possible sources: http://www.google.com/search?client=safa​ri&rls=en&q=aquarium+plants+snails&ie=UT​F-8&oe=UTF-8 In the future, you can ...
Sunday, February 24, 2013 at 11:59am

biology
Can a snail survive in an aquarium with no living plants in it? What do fish owners do to compensate if their aquarium has no plants?
Saturday, February 23, 2013 at 6:41pm

biology
27. Pretend you are a carbon atom that was part of a molecule of CO2 dissolved in the water at the beginning of the experiment. Describe a path you could take through both organisms in this experiment, including the molecules you would be a part of and the chemical reactions ...
Saturday, February 23, 2013 at 6:30pm

Biology
http://drdavespsychologypage.intuitwebsi​tes.com/Memory__What_Memory_.pdf
Saturday, February 23, 2013 at 1:34pm

biology needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
Saturday, February 23, 2013 at 1:31pm

Biology
A new individual (after 9 months, if human).
Saturday, February 23, 2013 at 1:28pm

Biology
Um.. A completely ready to develop creature, different from both parents, but having some attributes of both? I'm puzzled, because the question almost seems to answer itself, but there's my best guess. :P
Saturday, February 23, 2013 at 6:36am

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