Crocodiles are more closely related to _____ than to ________
What will be an ideal response?
birds, mammals.
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In arid terrestrial environments, salt can accumulate in the soil because of
A. the selective uptake of water by plants. B. the activities of grazing animals. C. the precipitation of salt from dry air. D. the secretion of salt by plants. E. the settlement and evaporation of water.
Fermentation directly
A) generates ATP. B) regenerates NAD+ from NADH. C) regenerates NADH from NAD+. D) produces acetyl CoA. E) initiates gluconeogenesis.
In most protostomes, the blastopore develops into the:a
gut. b. anus. c. nostril. d. mouth. e. coelom.
Plants could readily develop seasonal responses for flowering based on temperature changes but have "elected" through evolution to manage their rhythms based on a comparison of daylight and darkness. Why has the day-night ratio system been selected?
A. Temperatures fluctuate widely across seasons and from year to year, but photoperiod comparisons are a more reliable indicator of season. B. Temperature has no effect upon plant biochemistry. C. Temperature is a gradation but day/night is all-or-nothing. D. A plant's nervous system is tuned to light stimuli and not to temperature stimuli.