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When you feel a pulse, do you feel (a) the blood flow, (b) the pressure wave, or (c) brief changes in diameter of the artery due to the pressure wave? (post some literary source too)
Pathogenic organisms have evolved a number of mechanisms to evade or inactivate parts of the immune system. For each category of micro-organism (viruses, bacteria, parasites), describe two mechanisms that are unique to that category of micro-organ..
Which is easier to dispose of in a flock of chickens? A recessive allele for erect combs or a dominant allele for feathered legs. How various generations would it take.
The European land snail, Cepaea nemoralis, exhibits 3 phenotypes in shell color brown, pink and yellow. Shell color is controlled by one gene that has only two alleles. Brown is dominant to yellow and pink is the heterozygous condition.
A very short physiology student is asked to analyze the blood pressure of a very tall student. She decides to measure the blood pressure at the level of the tall student's foot while he is standing
The expected ratio of phenotypes among the progeny of a test cross is 1:1:1:1. Out of 200 total resulting progeny, 48 occur in one of the four phenotypic classes. Given this information, which of the following must also be true?
Suppose a woman who is both a homozygous tongue-roller and a non-PTC-taster marries a man who is a heterozygous tongue roller and is a PTC taster, and they have 12 children, how many of those 12 would you expect to be non-tasters, who are homozygo..
Design an experiment to demonstrate that DNA replication is semi-conservative. List two markers that one can use to label the DNA.
What is/are true of the polymerase chain reaction? a. PCR permits scientists to target a single copy of a single gene among millions of other sequences. b. PCR cannot be used to clone DNA of unknown sequence.
Briefly explain four different evidences of evolution of modern day organisms from a common ancestor. Present these ideas with an approximate timeline of major evolutionary events.
Compare the activation process for T cells to that of B cells. How are they similar, and how are they different?
What would happen if the I gene was moved to a different location in the genome? What would happen if the lac promoter was moved to a different location?
Explain how the potato cylinders changed in their turgidity. Recognize which of the solutions were isotonic, hypertonic, and hypotonic in relation to the potato.
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