Position of gonads varies in different animal groups. An octopus has gonads _____
a. on the back of its head
b. at the ends of its arms
c. in the abdominal cavity
d. in the coelom
e. on its penis
ANSWER: a
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In humans, male-pattern baldness may be assumed to be controlled by an autosomal gene that occurs in two allelic forms. Allele B determines nonbaldness, and allele b determines pattern baldness. In males, because of the presence of testosterone, allele b
is dominant over B. If a man and woman both with genotype Bb have a son, what is the chance that he will eventually be bald? A) 0% B) 25% C) 33% D) 50% E) 75%
The kidneys are protected by ____ tissue
a. adipose b. loose irregular connective c. dense regular connective d. stratified cuboidal epithelium e. simple squamous epithelium
What is the wobble hypothesis, and what implications does it have for base-pairing rules and selective pressure on codons?
What will be an ideal response?
The exit of an endospore causes the cell to
a. burst open b. return to dormancy c. lyse d. regenerate