If oxygen had been present at the beginning of organic evolution, one hypothesis suggests that
A. evolution would have been speeded up.
B. evolution would have been speeded up only for plants.
C. no change would be noted.
D. life would not have evolved.
D. life would not have evolved.
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Using the drawing of mRNA below, choose the letter that best fits the description
Sequences in this region may affect the initiation of translation or serve as binding sites for proteins that will target the mRNA transcript to specific locations in the cell. ____ What will be an ideal response?
How could a plant adapt to reduced sunlight in a dense forest?
a. The plant could cling to trees and grow upward. b. The plant could develop broader leaves. c. The plant could develop more roots. d. Both (a) and (b) are correct
A clade includes which of the following?
A. an ancestor and all its descendant species, and taxa with shared derived characters B. an ingroup only C. an outgroup and an ingroup D. a common ancestor and all its descendant species E. one taxon with shared derived characters
What is the fate of metabolites during respiration?
a. They are oxidized completely to carbon dioxide and water. b. They are reduced to from NADH and FADH2. c. They are oxidized completely to form pyruvic acid. d. They are rearranged to form GTP.