Compound eyes are composed of independent visual units called
A. apposition segments.
B. ocelli.
C. ommatidia.
D. retinas.
E. simple eyes.
C. ommatidia.
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The results of the coccolithophorid experiment done by Riebesell and colleagues showed that:
A. increasing CO2 levels lead to incomplete coccolithophorids. B. increasing pH levels lead to decreasing calcification rates. C. decreasing CO2 levels lead to deformed coccolithophorids. D. decreasing pH levels lead to significantly reduced growth rates. E. None of the answer options is correct.
The host range of a virus is determined by
A. the type of genetic information the virus contains. B. All of the answer choices are correct. C. the shape of the virus. D. specific receptors on cells it infects. E. the particular life cycle of the virus.
Humans differ from each other by 1 in 1000 to 1 in 5000 nucleotides, while chimpanzees differ from each other by 1
in 500 nucleotides. This suggests that _____. a. humans are a younger species b. humans are an older species c. humans descended directly from chimpanzees d. chimpanzees descended directly from humans e. chimpanzees and humans have identical proteomes
Adding a fibrinogen inactivator to blood would prevent:a
the formation of thrombin. b. platelet formation. c. the blood from clotting. d. constriction of the blood vessels. e. hemoglobin synthesis.