Which hormone causes less sodium and less water to be excreted in the urine?
a. ADH
b. angiotensin
c. aldosterone
d. erythropoietin
e. insulin
C
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A synapse is
A) a close association between neurons. B) a neurotransmitter molecule. C) a type of protein. D) a gene that controls the nervous system.
Mendel's dihybrid crosses, but not his monohybrid crosses, show that
a. some genes are linked together. b. the two alleles controlling a trait are divided equally among the gametes. c. alleles for different traits are inherited independently. d. one of the pair of alleles is dominant to the other. e. the crossing of two different homozygous forms will not produce any offspring in the first generation that will look like either of the parents.
Which of the following are the most abundant cell type found in most plants?
A) parenchyma cells B) collenchyma cells C) sclerenchyma cells D) food-conducting cells
Which phenotypic ratio is likely to occur in crosses of two completely dominant, independently segregating gene pairs when both parents are fully heterozygous?
A) 1:1:1:1 B) 3:1 C) 2:4:6:8 D) 9:3:3:1 E) 3:2:3:1