The oldest known megafossils of early vascular plants may be characterized as:
a. possessing dichotomously branched stems without leaves or roots.
b. possessing dichotomously branched stems with leaves.
c. possessing erect stems with megaphylls.
d. possessing roots but lacking sporangia.
e. lacking roots but possessing megaphylls.
a
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The plant hormone that promotes fruit ripening is ____
a. auxin b. gibberellin c. cytokinin d. abscisic acid e. ethylene
If a trait is X-linked dominant, who would express the trait?
A) females homozygous for the dominant allele and males hemizygous for the recessive allele B) heterozygous females and males hemizygous for the dominant allele C) females homozygous for the recessive allele and males hemizygous for the recessive allele D) females homozygous for the recessive allele and males hemizygous for the dominant allele E) significantly more females than males
In the Ames test, bacteria can mutate, even if they cannot grow.
A) True B) False
Which phosphorylation mechanism for recharging ADP to ATP is incorrectly matched with its description?
A) Substrate-level phosphorylation: A phosphate is transferred to ADP from a high-energy substrate after passing through an electron transport chain. B) Photophosphorylation: Passes electrons energized by solar energy through an electron transport chain C) Oxidative Phosphorylation: Passes electrons stripped from nutrients through an electron transport chain D) The descriptions for oxidative phosphorylation and photophosphorylation are incorrectly matched. E) The descriptions for oxidative phosphorylation, photophosphorylation, and substrate-level phosphorylation are incorrectly matched.