What is the function of centrioles?
A) They are the structure that holds the two daughter chromatids together at the centromere.
B) They cause cytokinesis via the concentric shortening of microtubules.
C) They are required for DNA replication.
D) They produce microtubules for the chromosomes to migrate along as they move to opposite poles of the cell.
D
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Your son has not had the MMR vaccine (measles, mumps, rubella) because you are apprehensive about vaccines and their side effects. Your sister says that you are setting him up for a potentially damaging scenario. Which argument has the great scientific validity and why?
A. Your sister is correct in her warnings. If your son gets a severe case of mumps, he will likely develop a fatal secondary infection. B. Your sister is correct. Even if your son does not get the mumps now when he is young, but gets the infection later in life, there is a possibility of severe side effects. C. You are correct to be apprehensive because vaccines have been the cause of autism in children. D. You are correct in protecting your son. If you can keep him from getting mumps when young, it is no longer a problem. It is simply a childhood disease.
If 25 individuals of a total population of 50 have the AA genotype and 10 have the Aa genotype, what is the frequency of the "a" allele?
A. 0.5 B. 0.3 C. 0.4 D. 0.6
Compare and contrast Southern, northern, and western blotting
What will be an ideal response?
Many farms in New England were abandoned in the 1800s as settlers reached the more fertile grasslands of the Midwest. These farms had been planted in different crops, but within five to ten years the farms appeared to have similar herbaceous and small
tree species on them. This is an example of: A) secondary succession. B) coevolution. C) primary succession. D) convergent evolution.