A) long night
B) short night
C) night neutral
D) short day
B) short night
C) night neutral
D) short day
Medullary breathing centers directly sense and respond to
A) blood pH and CO2 concentration.
B) blood O2 concentration.
C) alveolar O2 concentration.
D) blood pH and O2 concentration.
Answer: A
Biology & Microbiology
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A point mutation that causes no change in the amino acid sequence of a protein is called a _____
A. synonymous (silent) mutation B. nonsynonymous (missense) mutation C. nonsense mutation D. stop mutation E. transition mutation
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Early seed plants were pollinated by _______, as are present-day conifers.
A. beetles B. bees C. trilobites D. wind E. water
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Eggs have receptors that recognize surface proteins on sperm of their own species. This illustrates ____
a. behavioral isolation b. gametic isolation c. hybrid breakdown d. hybrid inviability e. hybrid sterility
Biology & Microbiology
Oats are eaten by humans as oatmeal or rolled oats, and as feed for livestock such as cattle. In order for an oat plant to make the part we eat (the seed), it must flower and be pollinated. Typically, oat plants flower when days are lengthening (i.e., late spring to early summer). What is the best classification for oat plants?
Biology & Microbiology