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.
a
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The earliest humans used tools to
a. assist in locomotion. b. provide protection. c. facilitate the processing of food. d. ward off predators. e. construct shelters
When a cell is active, the levels of carbon dioxide are ________ inside the cell than outside the cell, causing the gas to diffuse out of the cell
Fill in the blank(s) with correct word
Which is NOT true about the chromosomes of a multicellular organism?
a. they are made up of DNA and protein b. each chromosome is replicated into two chromatids during the S stage of interphase c. Each chromosome separates into two daughter chromosomes by binary fusion d. all cells contain chromosomes that carry the same genetic information
The two nitrogen atoms in nitrogen gas (N2) share six electrons forming a ________.
A. single covalent bond B. triple covalent bond C. hydrogen bond D. double covalent bond E. double bond