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
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
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
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
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
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
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
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
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
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
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
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 - 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 - 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
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
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
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
I nee help revising my essay here it is This is what my general view on American History. Well let me tell you its 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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
what be the greatest visual magnification ahieved with normal kind microscopes like compound type? that be 1000x. but how you can determine this for any microscope? what be the depth of field? and what power be depth of field the smallest? what power an object be the biggest? ...
Saturday, February 4, 2012 at 5:23pm
Tube # 1: 1 ml of water, 3 ml of glucose-1-phosphate and 3 ml of Enzyme. Tube # 2: 1 ml of Ph 7 buffer, 3 ml of glucose-1-phosphate and 3 ml of Enzyme. Both of these reactions tested positive, and the same enzyme was used for both tubes. Why Did you get get a positive reaction...
Saturday, February 4, 2012 at 11:59am
Using a special balloon that is permeable to water but not sucrose to make an "artificial" cell. The balloon is filled with a solution of 20% sucrose and 80% water and is immersed in a beaker containing a solution of 40% sucrose and 60% water. The solution in the ...
Saturday, February 4, 2012 at 11:29am
Predict which would diffuse faster, briefly explain why. a. Methylene blue or KMnO4 with the same concentration b. 1.0M vs 0.1 M methylene blue solution c. KMnO4 at 0oC and 100oC
Thursday, February 2, 2012 at 6:21pm
Give the sequence of a reverse primer used to insert a BamHI site (GGATCC) at the 3' end of the following sequence: 5' CTGAACGTCCAAGGCTTAA 3' 3' GACTTGCAGGTTCCGAATT 5' Make sure you indicate your primers polarity.
Tuesday, January 31, 2012 at 11:16pm