In most male animals, the penis or other copulatory organ achieves erection by
A. artery dilation or hemolymph pressure.
B. bones or exoskeleton interlocking.
C. muscle contraction.
D. testicular pressure.
Answer: A
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A mutation in yeast makes it unable to convert pyruvate to ethanol. How will this mutation affect these yeast cells? The mutant yeast cells will _____
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Which organism causes malaria?
a. apicomplexa b. ciliate c. dinoflagellate d. foraminifera e. radiolaria
If a cell lacks transcription factors, ________ will never be transcribed
Fill in the blank(s) with correct word