Unlike simple diffusion, facilitated diffusion requires energy expenditure by the cell.
a. true
b. false
b. false
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Boyle's law of gas behavior predicts that as the volume of the lungs _____, the pressure of gases within the lungs must ______.
A. increase, decrease B. increase, increase C. decrease, decrease D. increase, not change E. decrease, not change
The reason some individual hormones have multiple effects on different target tissues is that ____
a. gene transcription is altered b. second messengers trigger cascade or amplification effects c. many different cells in different tissues have specific receptors for the hormone d. only a small amount of the hormone is required for its effect e. hormones can conform to multiple receptors
What is the most appropriate term for a mature pollen grain?
a. megaspore b. microspore c. male gametophyte d. female gametophyte e. immature sporophyte
Mushrooms that we eat are technically referred to as:
a. basidiospores.
b. basidiocarps. c. myceliae. d. hyphae. e. gills