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August 20, 2014

Homework Help: Science: Biology

Recent Homework Questions About Biology

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biology
how can nanobots be used to fight the common cold?
Monday, March 12, 2012 at 5:26pm

biology
briefly describe the basic characteristics that all living things on earth have in common
Monday, March 12, 2012 at 5:18pm

Biology Question
I have 2 problems/questions I am unsure of the answers. The first one is "how would you demonstrate the Valsalve maneuver using the model lung?" and 2. If a woman is breathing rapidly and deeply after exercise, would TLC, RV, TV, IRV, and ERV stay the same, increase...
Sunday, March 11, 2012 at 9:02pm

Biology
can anyone send me a website link to a Monocot and Dicot Leaf and Stem cells under a microscope? (not cross section) Also, do they both have a cell nucleus?
Sunday, March 11, 2012 at 4:04pm

Biology
Why does the pCO2 value increase during hypoventilation? If hypoventilation causes shortness of breath, would that not increase the CO2 concentration, therefore decreasing pCO2? What am I understanding incorrectly?
Sunday, March 11, 2012 at 12:51pm

biology
If you have the option to save from extinction either the carnivores oor the primary produccers in an ecosystem which whould you protect? why
Sunday, March 11, 2012 at 12:30pm

biology
If you have the option to save from extinction either the carnivores oor the primary produccers in an ecosystem which whould you protect? why
Sunday, March 11, 2012 at 12:30pm

biology
A medical microbiological lab report indicates that a sample contained a biofilm, and that one species in the biofilm was identified as Neisseria gonorrhoeae. Is this strain of Neisseria likely to be pathogenic? Why and why not?
Sunday, March 11, 2012 at 3:37am

biology:plz someone help
The heart lung machine is used so that surgeons can operate on the arteries supplying heart muscle. These arteries may be diseased. (a) Name these arteries and explain how they may become diseased. (b) suggest why a patient is put on a heart lung machine during such an ...
Saturday, March 10, 2012 at 9:40am

biology
can toads are considered a pest in australia are there anyways that they can adapt to their surroundings without the food chain being damaged
Saturday, March 10, 2012 at 8:03am

biology:plz help
state the name for the action of two oppposing miscles, such as the biceps and the triceps.
Saturday, March 10, 2012 at 6:04am

biology
Why is a denaturing solution used in the Southern blotting technique?
Friday, March 9, 2012 at 1:21pm

Biology
H+Hb --> HHb HHb --> H+Hb which process is internal respiration and which process is external respiration???
Friday, March 9, 2012 at 7:35am

biology
humans have a double circulation system. there is a low pressure circulation and a high pressure circulation. (a) explain how the structure of the heart enables it to pump blood into two circulations at different pressures
Friday, March 9, 2012 at 6:24am

biology
The heart lung machine is used so that surgeons can oprate on the arteries supplying heart muscle.the arteries may be diseased. (a) Name these arteries and explain how they may become diseased (b) suggest why a patient is put on a heart lung machine during such an operation.
Friday, March 9, 2012 at 5:55am

biology
The heart lung machine is used so that surgeons can operate on the arteries supplying heart muscle. These arteries may be diseased. (a) Name these arteries and explain how they may become diseased. (b) suggest why a patient is put on a heart lung machine during such an ...
Friday, March 9, 2012 at 5:52am

Biology
Help please! Do organic fertilizer products (in bags or sacks) decay after some time? If yes, how long will it take to decay?
Thursday, March 8, 2012 at 10:06pm

Biology
for my sister again. what be 2 examples of short wave radiation that can trigger mutation. she only found uv radiation.
Thursday, March 8, 2012 at 8:15pm

Biology
What is the difference between Curing, Composting and Fermentation?
Thursday, March 8, 2012 at 7:49pm

Biology
i asking question for my sister again how r gene combina tions reshufled? my sister and i find this paragraph online but we not able to get answer. Sex can introduce new gene combinations into a population and is an important source of genetic variation. You probably know from...
Thursday, March 8, 2012 at 7:40pm

Biology
Is Carbon (in soil) bad for plants?
Thursday, March 8, 2012 at 7:37pm

biology
If short hair (L) is dominant to long hair (l), then to determine the genotype of a short-haired animal it should be crossed with Answer a. Ll b. ll c. LL d. All of the above. e. None of the above.
Thursday, March 8, 2012 at 5:15pm

Biology
As a nurse in a hospital, your observe that certain kinds of pain may be allievated by mere offering of a drug, potent or not. To test this hypothesis, two pain drugs and placebo randomly adminstered to patients following surgery. Time is recorded in hours until patient ...
Wednesday, March 7, 2012 at 9:02pm

Biology
Explain how skin, bones and muscles are related to each other and Why is this relationship important to the understanding of the skeletal and muscular systems?
Tuesday, March 6, 2012 at 11:08pm

Biology
Which of the following would be the most sigificant between mitosis and meiosis? A. Chromosomes are duplicated before mitosis B. Meiosis is not followed by cytokinesis C. Homologous Pairs of chromosomes are split up in meiosis. D. Crossing over occurs in mitosis. So far i got ...
Tuesday, March 6, 2012 at 3:04am

Biology Science
Arrange the following in correct order in food chain- Fish,Plankton,Shark,Crab
Monday, March 5, 2012 at 1:47am

biology
Question 18 If a child was allergic to a substance scratched onto their skin, the area turned red and swollen within about 10 minutes. Which of the following would cause these symptoms? Answer Release of interleukin-10 Recruitment of B cells Release of histamine The presence ...
Sunday, March 4, 2012 at 11:36pm

biology
If a child was allergic to a substance scratched onto their skin, the area turned red and swollen within about 10 minutes. Which of the following would cause these symptoms?
Sunday, March 4, 2012 at 10:52pm

Biology multiple choice question
If a randomly-mating population has an established frequency of 64% for the organisms homozygous dominant for a given trait, what is the frequency of this dominant allele in the gene pool? A. .2 B. .24 C. .36 D. .8 E. .64 I think the answer is D. .8
Sunday, March 4, 2012 at 9:27pm

Biology
I'm confused on the rule of multiplication and the rule of addition. When do I use each to determine the probability of a genetic trait being inherited.
Sunday, March 4, 2012 at 8:58pm

Biology
Individuals whose characteristics are well-suited to their environment survive. Individuals whose characteristics ar not well-suited to their environment either die or leave fewer offspring. This principle Darwin called survival of the fittest. how i rewrite this definition in...
Sunday, March 4, 2012 at 8:17pm

Biology
two negative effect of direct artificial selection?
Sunday, March 4, 2012 at 7:29pm

Biology
my sister still be sick so i still helping her post questions. i write paragraph from her textbook that go with question. Ultimately, Darwin recognized in nature a process that operates in a manner similar to the way artifical selection worked on farms and in fields. Darwin ...
Sunday, March 4, 2012 at 12:20pm

Biology
Arrange the following in correct order in food chain- Fish,Plankton,Shark,Crab
Saturday, March 3, 2012 at 10:46am

Biology - ms. sue
ms. sue can u please tell me about noah's flood. exactly what it was and how it got thought of to make fossils? i get bits and pieces of information like how species get buried in flood. (sediment) but my sister and i look at all sites and they not tell how fossils came to...
Friday, March 2, 2012 at 11:03pm

Biology ms, sue
ms. sue i think you told shreya about biology site. there be any more sites free like that?
Friday, March 2, 2012 at 7:50pm

Biology - evolution
how new characteristics enter gene pool? i look for simple answer to this to help my sister. one thing i look at it say about mutation.
Friday, March 2, 2012 at 7:39pm

Biology - fossils
my sister Shreya be sick so i posting her biology questions. one question ask hw did creationists explain fossils. she write this be about noah's flood but what be noah's flood? i look up on internet for her and there be too much confusing words. i only be able to make...
Friday, March 2, 2012 at 6:26pm

Biology
The observed distribution of offspring was: black-red 1,070; black-white 177; green-red 180; green-white 1,072. Based on these data, what is the recombination frequency? A. 86% B. 7% C. 17% D. 14% E. 30% Background Info: In a particular species of mammal, black hair (B) is ...
Friday, March 2, 2012 at 3:22am

Biology
Jessica has no dimples and attached ear lobes. Jessica's mother has dimples and detached ear lobes, and her father has no dimples and attached ear lobes. Assuming independent assortment, what are the chances that her new baby brother will have dimples and attached ear lobes?
Wednesday, February 29, 2012 at 2:42am

Biology
Our most potent weapon in the fight against viruses is: 1.Antibiotics and sulfa drugs 2.Vaccinations 3.Gene therapy 4.Sulfa drugs 5.Antibiotics I dont know if it is 2 or 5. I am thinking more 5 but then I think about 1 also. Someone please help.
Tuesday, February 28, 2012 at 10:32pm

biology
list 2 forms of oxygen found in the atmosphere name the process by which [1]oxygen from the atmosphere is used up [2]oxygen is returned to the atmosphere
Monday, February 27, 2012 at 10:25am

Biology
How did Watson and crick's model explain why their are equal amounts of thymine and adenine in DNA?
Saturday, February 25, 2012 at 2:52pm

Biology
What is the importance of embryo polarity during cleavage?
Saturday, February 25, 2012 at 1:54am

american history
I nee help revising my essay here it is This is what my general view on American History. Well let me tell you it’s a course that we all have to take in high school to graduate. In school we are confronted with American History, state History and general courses of the ...
Friday, February 24, 2012 at 7:37pm

Biology
Some questions fall outside of the realm of science;which of the following questions could not be ansewered usingf the scientifec method
Friday, February 24, 2012 at 4:42pm

Biology
Denny, who is allergic to wool, accidentally wears a scarf that is 50% wool. one hour later, after removing the scarf, she finds that the skin around her neck is red and swollen. Explain what has happened to her. (Our unit is Blood and immunity)
Friday, February 24, 2012 at 1:51pm

Biology
Is nail sulcus and nail fold the same thing?
Friday, February 24, 2012 at 10:13am

biology
Is Starch a long-term energy source or short-term energy source? please explain!
Thursday, February 23, 2012 at 9:31pm

biology
Is Protein a short term energy source or a long term energy source? please explain
Thursday, February 23, 2012 at 9:29pm

biology
Discuss the concept of species What ways do modern taxonomists use to distinguish different species?
Wednesday, February 22, 2012 at 11:16pm

biology tutor on jiskha
i post my biology questions here today and few days ago no teacher reply. there not any biology tutor on here?
Wednesday, February 22, 2012 at 9:57pm

biology
you are investigating a crime. someone has died as a result of a gun shot from far away. The suspect claims that it couldnt have been him because he was with the victim at the time of the murder. they were in a restaurant eating pasta. how could you test to see if the suspect ...
Wednesday, February 22, 2012 at 7:49pm

BIOLOGY
The doubling time of a type of bacteria is 35 minutes. If every bacterium reproduces, then after 35 minutes a population of 64 bacteria will have grown approximately to what size?
Wednesday, February 22, 2012 at 4:06pm

Biology Lab
HOw much Nacl (MW= 58.44g) would you need to ass to a solution if you wanted to make 100 ,mL of 4* 10 to the -3 M NaCl?
Wednesday, February 22, 2012 at 3:27pm

science
why is the gibb free energy important in plant biology
Wednesday, February 22, 2012 at 1:41pm

Biology
Are saltwater gills different from freshwater gills? Please explain to me
Wednesday, February 22, 2012 at 7:10am

biology
any site i go onto that be animation site to find out about nucleic acids and protein synthesis? this chapter soo hard. codon, anticodon i need animation.
Wednesday, February 22, 2012 at 12:34am

biology what is DNA
why is DNA replication necessary to life?
Wednesday, February 22, 2012 at 12:33am

biology
why DNA replication necessary to life?
Tuesday, February 21, 2012 at 8:54pm

Biology- DNA
why dna replication necessary to life? i think it because it carry genetic information?
Monday, February 20, 2012 at 10:36pm

biology
Regulation of an enzyme's activity occurs a) before the enzyme is produced b) during the production of the enzyme. c) when the enzyme already exists in the cell. d) at any point on the enzymatic production pathway. Thank you
Monday, February 20, 2012 at 9:57pm

biology
Which nutrient functions BOTH as an enzymatic cofactor and as a stabilizer of ribosomes and nucleic acids? a) potassium b) phosphorus c) calcium d) Magnesium Thanks for your help!!
Monday, February 20, 2012 at 9:43pm

Biology
Most frog species have a distinct tadpole life stage. However, microhylids of Australia and New Guinea do not have a tadpole stage, but tadpole features appear and disappear during development in the eggs. This shows that A) microhylids need to be very large. B) microhylids ...
Monday, February 20, 2012 at 1:09am

Biology
Does the amplitude of QRS complex change with the pulse amplitudes? Why or why not? So I think that the amplitude of the QRS complex should cause the pulse amplitude to change, because the pulse pressure is determined by the force of contraction of the heart. Am i on the right...
Friday, February 17, 2012 at 6:18pm

biology
100 ml of agno3 at 0.1g/ml
Friday, February 17, 2012 at 2:59pm

biology
suggest a reason for the failure of some of the molecules to diffuse through the semipermeable membrane.
Friday, February 17, 2012 at 1:16pm

biology anyone..
please i need this by tomorrow. if nucleii are 3 micrometres long, how big are the cells? these r 2 questions i not get.
Thursday, February 16, 2012 at 11:10pm

biology
this part of organism usually found underground, what organele conspicuously absent?
Thursday, February 16, 2012 at 10:47pm

biology
For this assignment you will be using the course companion Web site, MasteringBiology. View and complete the MP3 tutorial: The Process of Science. and “How Does Acid Precipitation Affect Trees?” After completing the activity, develop two alternative hypotheses and ...
Wednesday, February 15, 2012 at 10:46pm

biology
Create and describe a data set including independent and dependent variables (be creative) and a table of the data. Explain how this would best be graphed to accurately present the results of the research (type of graph, axes, and scale limits – minimum and maximum).
Wednesday, February 15, 2012 at 10:45pm

Biology
I have answered all the other questions on this sheet but I am stuck on this one: Why is it fair to assume that the proportion of cells in each phase of the cell cycle represents the proportion of time spent by individual cells? This is to do with the cell cycle and mitosis.
Wednesday, February 15, 2012 at 5:56pm

Biology
Why can this statement not be evaluated by the scientific method "Trees emit psychic screams when you cut them down."?
Wednesday, February 15, 2012 at 10:50am

probability
The probability that a student passes Biology is 0.35 and the probability to pass Chemistry is 0.63. If the probability to pass both Biology and Chemistry is 0.4, what is the probability that he will pass either Biology or Chemistry?
Wednesday, February 15, 2012 at 8:43am

biology
Can someone please explain to be the concept of - Rate of exchange is proportional to a cells surface area and ... the amount of exchange material is proportional to a cell's volume. (the topic we are learning is called "Animal form and function")
Tuesday, February 14, 2012 at 7:03pm

biology
Total body sodium content determines extracellular fluid volume, and is regulated by the balance between sodium intake and sodium loss. Oubain is a poison that causes blockage of the Na+/K+ ATPase. Which of the following would occur after administration of oubain? Explain why...
Tuesday, February 14, 2012 at 5:51pm

biology
1) I can't finish my homework due to this one question, please tell me where I can find this question, thanks! What are levels of protein structure of Angiosperms?
Tuesday, February 14, 2012 at 12:38pm

Biology
In ion exchange chromatography, why do you have to be careful not to disturb the resin bed or let air enter the resin bed? I get that it disturbs resolution.. but I'm not sure exactly what to say.
Sunday, February 12, 2012 at 8:07pm

Biology
How are soldier crabs useful to us and what things are humans doing to wipe them out?
Sunday, February 12, 2012 at 6:35am

Biology
What important role does the marine compost play in a marine ecosystem?
Saturday, February 11, 2012 at 5:32am

biology
how to identify the blood types of an offspring?
Saturday, February 11, 2012 at 3:34am

Biology
Give diffferences/contrast between a Marine environment and an estuarine environment.
Friday, February 10, 2012 at 8:39pm

biology
1. explain that not all cell genes show simple patterns of dominant and recessive alleles. 2. explain how to identify th blood types of an offspring. 3. discuss how gender in humans is determined.
Friday, February 10, 2012 at 7:06pm

English
Writeacher, I wanted to thank you for all what you have done for me and for my professional growth. We have worked really hard on the project over the last few days (though I was in bed with flu!) By the way, I used your suggestion as a title for the whole project. If the ...
Friday, February 10, 2012 at 4:26am

Biology
What are two ways in which water availability affects the distibution and abundance of species in Australia?
Thursday, February 9, 2012 at 10:05pm

English
One last thing. I varied this sentence since we are going to involve students from different third classes.I don't know how to express the second part. Pupils taken from different (or various) tenth classes will be involved in the project since the scientific project's...
Thursday, February 9, 2012 at 1:42pm

English
Writeacher, thank you very much! Here are some sentences I varied and I urgently need you to check. I need to clarify those things. Could you please help me express sentence 1? We need to impress the EU to support the project!!! Rationale 1)The preparatory meeting made clear ...
Thursday, February 9, 2012 at 4:09am

English
Here are the integrations into ongoing activities which refer to the two other schools. Thank you very much! 1) The project, its cycle and the outcomes will be integrated as followed: .......Gymnasium: The 10th class will be involved in project because the project subject is ...
Wednesday, February 8, 2012 at 4:00pm

biology
why regeneration of body organs in humans are not developped?
Wednesday, February 8, 2012 at 2:33pm

biology
I have codone AUG. Which one of amino acids will be involved in protein making, if nucleotide with adenine (A) will be changed to nucleotide with cytosine (C)?
Wednesday, February 8, 2012 at 1:31pm

biology
which leukocyte is predominant in the blood smear? explain by comparing it with other leukocytes ad red blood cells in the blood smear
Tuesday, February 7, 2012 at 2:54pm

English
Thank you very, very much for helping me! I still have to mention a few things to connect the description of the school to the need of promoting the study of English and IT. I hope you can help me express them. 1) I also wanted to say that students from the applied sciences ...
Tuesday, February 7, 2012 at 5:06am

English
Here is the second part of the school description I need to translate. Some words are unclear and the sentences are too wordy. I need your help to improve them. 1) third branch includes the study of two foreign languages: English and French and addresses to all those who wish ...
Monday, February 6, 2012 at 8:09pm

biology
the importance of these organic compounds ( carbohydrates, proteinds, lipids) in the cells and tissues of living things
Monday, February 6, 2012 at 6:32pm

biology
does the human ovum produce any chaemotactic hormones or sugars to attract sperm cells?
Monday, February 6, 2012 at 1:40am

biology
why do serum protein molecules such as albumin and lysozyme adopt different changes within physiological pH range?
Sunday, February 5, 2012 at 6:40pm

biology
why do serum protein molecules such as albumin and lysozyme adopt different changes within physiological pH range?
Sunday, February 5, 2012 at 2:32pm

Biology
From the problem above, which fish would be most likely to die when dropped into hot water at 30 degrees Celsius, a fish acclimatized to 4 degrees C or a fish acclimatized to 16 degrees C?
Saturday, February 4, 2012 at 6:52pm

Biology
Describe some of the physiological changes that happen to the cell membranes of a rainbow trout as it acclimatizes to cold, water at 4 degrees Celsius, after living at 16 degrees Celsius for a long time?
Saturday, February 4, 2012 at 6:51pm

Biology
Would you expect an ectoparasite, such as a bird louse, that lives its entire life on the body of a homeothermic host, to have a broad thermal tolerance? How about mite that lives on the bodies of rattlesnakes?
Saturday, February 4, 2012 at 6:51pm

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