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Consider the distinction between evolution and natural selection.
a) Under what circumstances can evolution occur in the absence of natural selection? Give two different examples, invoking different evolutionary forces in each.
b) In what circumstances can natural selection occur and yet not result in evolution? Give two different examples.
What is the purpose of the long refractory period during cardiac muscle contraction (compared to that of skeletal muscle)? What could happen if cardiac muscle did not have this long refractory period? Explain.
Thelarge white-tailed deer population in a forest reserve in Ontariohas caused concern about overgrazing that might lead to theextinction of plant and animal species found there.
Let us say that you are working with microtubules. You have attached kinesin (the standard type) dimers to a glass slide and have added complete microtubules to the slide along with ATP. Your kinesins are lined up well enough that you can see the ..
A heterozygous brown-eyed human female who is a carrier of color blindness marries a blue-eyed male who is not color-blind. Color blindness is a sex-linked trait. Assume that eye color is an autosomal trait and that brown is dominant over blue. Wh..
Give a probable explanation for the inheritance of the melanotic mutation. A 19 year old model for Glamour magazine tripped over an extension cord causing injury to her epidermis. She is afraid injury will leave a scar. Based on your information of r..
Post-translational modifications of proteins play crucial regulatory functions. Identify three different post-translational modifications and describe two different techniques that would distinguish a modified versus unmodified form of the same pr..
A cell whose cytoplasm has a concentration of 0.02 molar glucose is placed in a test tube of water containing 0.02 molar glucose. Assume that glucose is not actively transported into the cell, which terms describes the tonicity of an external solutio..
Glucose oxidase is an enzyme that can be used for measurements of glucose levels by combining this reaction with an oxygen probe.
What is the effect on translation of the action of tetracycline? In your answer be sure to describe the normal steps to ribosome assembly and protein translation.
How do you create a concept map using the following terms to show the process of digestion with these terms bile, chemical digestion, chyme, digestion, molar, pancreas, saliva, small intestine, and stomach?
How are bryophytes similar to green algae? How are they different
Which of the following sequences represents the hierarchy of biological organization from the least to the most complexlevel?
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