Much of our understanding of how large organisms respond to environmental variation is based on observations of
model species.
Indicate whether the statement is true or false.
True
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The age structure diagram for rapidly growing
populations a. is in the form of a pyramid with a broad base. b. is characterized by a large percentage of the population in the post-reproductive years. c. has a very broad middle, showing a large number of young. d. has about equal distribution among all age groups. e. is in the form of an inverted pyramid.
In the processes of endocytosis and exocytosis, a molecule is moved across the plasma membrane by a protein, which changes shape or orientation.
a. true b. false
Waste products that contain nitrogen are produced by cells as the metabolize ____.
Fill in the blank(s) with the appropriate word(s).
The function of the malleus, incus, and stapes in the middle ear is to:
a. amplify the vibrations of sound waves. b. cause the organ of Corti to rub against the tectorial membrane. c. detect movement of the endolymph in the cochlear duct. d. relieve pressure differences between the middle ear and atmosphere. e. give support to the membranous labyrinth.