After Darwin concluded his voyage on the Beagle, he proposed that the process of natural selection was a mechanism for:
A. overpopulation of finches on the Galapagos Islands.
B. speciation.
C. artificial selection.
D. sexual selection.
E. evolution.
E
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Which animal would you expect to have the most diverse olfactory receptors to enhance their sense of smell?
a. dog b. monkey c. human d. angelfish e. earthworm
Herceptin® is a drug that is given to treat certain breast cancers. However, it is most effective on tumors that are overexpressing the gene HER2. Which of the following strategies would be best for determining whether Herceptin® would be effective in a given patient?
A) Sequence DNA from the patient's sperm or eggs to determine whether the patient's germ cells contain gain-of-function mutations in HER2, and treat with Herceptin® only if they do. B) Determine the patient's HER2 sequence and compare it to a database of known HER2 mutations to determine whether the overexpression allele is present; if the overexpression allele is present, give Herceptin®. C) Determine the patient's HER2 sequence and compare it to a database of known HER2 mutations to confirm that the patient has a mutation in the gene; give Herceptin® if any mutation is found. D) Perform microarray analysis to determine the location of the patient's HER2 gene and give Herceptin® if the HER2 gene is not in the normal location.
The number of individuals of the same species in some specified area or volume of habitat is the ____
a. population density b. population growth c. population birth rate d. population size e. carrying capacity
The heart secretes the hormone ________, which lowers blood pressure by increasing the excretion of salt and water
Fill in the blank(s) with correct word