Any physical or chemical agent that brings about an increase in congenital malformations is called a(n) ____
a. teratogen
b. hormone
c. ARX factor
d. cytocin
e. trophoblast
a
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Factors that govern microevolution are rooted in two related phenomena, they are
A. first, introduction of new genetic variation into a population and second, mutations. B. first, altering the prevalence of a given allele or genotype in a population and second mutations. C. first, introduction of new genetic variation into a population and altering the prevalence of a given allele or genotype in a population. D. first, splitting up a population and second migration. E. first, nonrandom mating and second no natural selection.
In cases of the “winter blues” treatment with a bright
artificial light can reduce the effects by a. increasing thyroid gland activity. b. decreasing pineal gland activity. c. increasing gonadal output. d. pancreas reduction. e. kidney adrenal gland activation.
During inhalation
a. the pressure in the thoracic cavity is greater than the pressure within the lungs. b. the pressure in the alveoli is less than the atmospheric pressure. c. the diaphragm moves upward and becomes more concave. d. the chest cavity volume decreases. e. all of these occur.
Mutant plants that wilt easily under strong sunlight and high temperatures have been isolated. The stomata in these plants are functional, but do not respond to ABA. What protein may be missing from these plants?
A. P proteins B. ABA receptor C. aquaporin D. H+-ATPase proton pump