Which is incorrect about inducible operons?
A. They have genes turned off by a buildup of end product.
B. They are turned on by the substrate of the enzyme.
C. They include the lac operon.
D. They are often for use in catabolic pathways.
E. They are normally turned off.
Answer: A
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Oak trees and many other plant species have years in which they have synchronous production of many progeny by all individuals in a population. This is known as
A. sympatry. B. crypsis. C. armorment. D. masting. E. None of the choices are correct.
Glands are derived from _____ tissue
a. epithelial c. muscle b. connective d. nervous
Four of the five answers listed below are
characteristic of sclerenchyma cells. Select the EXCEPTION.
a. sclereid b. found in seed coats c. remain alive after maturity d. gritty texture of pear cells e. used in manufacture of paper, cloth, and rope
Many organisms have different reproductive strategies. Which of the following most accurately
reflects altruistic behavior? a. courtship rituals b. dominance hierarchy c. optimal foraging strategies d. infant care of related offspring e. territoriality