What is the proper sequence in the flow of air
in mammals?
a. nasal cavities, larynx, pharynx, bronchi,
trachea
b. nasal cavities, pharynx, bronchi, larynx,
trachea
c. nasal cavities, pharynx, larynx, trachea,
bronchi
d. nasal cavities, larynx, pharynx, trachea,
bronchi
e. nasal cavities, bronchi, larynx, trachea,
pharynx
C
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The innermost whorl of a flower typically consists of one or more ____
a. petals b. carpels c. stamens d. receptacles e. sepals
Photosynthesis probably originated during the __________ era, and most likely used _____________ as an electron donor.
A. Proterozoic; hydrogen sulfide B. Paleozoic; water C. Proterozoic; water D. Archean; water E. Archean; hydrogen sulfide
Which sequence is correct for the of development of mature bone cells?
A. osteogenic cells ? osteocytes ? osteoblasts B. osteoblasts ? osteoclasts ? osteogenic cells C. osteoclasts ? osteoblasts ? osteocytes D. osteogenic cells ? osteoblasts ? osteocytes
Which of the following provides the likeliest explanation for the differences seen in the human population?
A. presence of parasites in different areas B. amount of sunlight in different areas C. the altitude in different areas D. natural selection