Which of the following cell types can become the meristematic cells of a vascular cambium? Select all correct choices
A. shoot apical meristem cells
B. procambial cells
C. epidermal cells
D. parenchymal cells
B,D
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The evolution of petals through the AP3 gene is best explained by
A. a new gene mutation. B. the modification of an existing gene for a new function. C. homoplastic convergence. D. gene duplication and divergence. E. conserved genes.
A type of horizontal gene transfer in prokaryotes in which a cell receives DNA from another cell through sex pili is:
a. Transformation b. Replication c. Transduction d. Conjugation e. Fixation
Which of the following factors do not influence the action of enzymes?
A. the amount of reactant in the cell B. temperature of the cytoplasm C. pH of the cytoplasm D. presence of a repressor E. relative humidity
What greatly increases the capacity of the stomach?
A. polyps B. rugae C. lumens D. diverticula E. crypts