Which of the following will be found in testes and ovaries to make the steroid hormones?
a. chloroplast
b. mitochondria
c. rough ER
d. peroxisome
e. smooth ER
Answer: e. smooth ER
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What is the purpose of synthesizing a negative strand RNA in positive stranded ssRNA viruses?
A) enable rolling circle amplification of the genome, which requires both strands of RNA B) enable transcription of genes occurring on both the negative and positive strands of the genome, such as overlapping genes C) proofreading of the genome to minimize mutations generated by the polymerase being passed onto virion progeny D) to serve as the complementary template sequence in genome amplification of the positive strand
At the base of a steep continental slope a gentle slope is called:
a. a bajada. b. a delta. c. an inverse plane. d. the continental rise. e. an abyssal hill.
Compound leaves have:a
parallel veins instead of netted veins. b. alternate leaf attachment instead of opposite leaf attachment. c. palmately netted leaves instead of pinnately netted leaves. d. two or more leaflets instead of a single blade. e. many leaves per plant instead of a single leaf per plant.
The two scientists credited with the formulation of the cell theory (cell doctrine) from the 1800s are
A. Watson and Crick. B. Schleiden and Hooke. C. Schleiden and Schwann. D. Ben and Jerry. E. Schwann and Jenner.