The breakdown of glucose to pyruvate by a cell is an example of a(n) ________ reaction.
A) anabolic
B) aerobic
C) catabolic
D) amphibolic
E) synthesis
C) catabolic
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Assume that production of hairs on a plant’s leaves is controlled by a single gene with two alleles, H (dominant) and h (recessive). Hairy leaves are dominant to smooth (nonhairy) leaves.
a. Name the genotype(s) of a smooth-leaved plant. b. Name the genotype(s) of a hairy-leaved plant. c. What are the possible genotypes of gametes produced by the smooth-leaved plant? d. What are the possible genotypes of gametes produced by the hairy-leaved plant? Homozygous:
Why have plants been implicated in the Ordovician and Devonian glaciations, but not the Proterozoic glaciations?
A. Land plants had not yet evolved during the Proterozoic. B. Proterozoic plants had simple root structures that did not increase rock weathering. C. Proterozoic plants used anoxygenic photosynthesis. D. The nonvascular plants present during the Proterozoic did not contribute to global nutrient cycles.
Gametophyte plants produce gametes using:a
mitosis. b. meiosis. c. fertilization. d. polyploidy. e. sporogenesis
What type of bonding is responsible for maintaining the shape of the tRNA molecule?
A. van der Waals interactions between hydrogen atoms B. covalent bonding between sulfur atoms C. peptide bonding between amino acids D. hydrogen bonding between base pairs E. ionic bonding between phosphates