When you step on a cockroach or smash a fly, the blood appears colorless because
A. there are no cells in the hemolymph.
B. the blood is enclosed in a closed circulatory system.
C. it does not contain hemoglobin or any other respiratory pigment.
D. the blood is actually a colorless hemolymph that carries oxygen on molecules other than reddish hemoglobin.
Answer: C
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What term correctly describes change in allele frequency due to random effect of a small population?
A. mutation B. selection C. non-random mating D. genetic drift E. immigration
____ are the structures formed by roots that house nitrogen-fixing bacteria
Fill in the blank with the appropriate word.
Because birds such as the black widowbird eat fruit and insects, they are considered to be
__________.
a. autotrophs b. heterotrophs c. producers d. decomposers
A driver gene ____
a. contains a driver mutation that does not affect gene expression b. does not have any effect on cancer progression c. contains a driver mutation that causes apoptosis in normal cells d. contains a driver mutation or is expressed abnormally, conferring a growth advantage to the cell e. is the unmutated form of a proto-oncogene