Plants with seeds inside a fruit
A. produce pollen.
B. are angiosperms.
C. are flowering plants.
D. All of the above are correct.
D. All of the above are correct.
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Noneveloped viruses enter their animal host cell via an active process that requires the participation of the animal cell.
Answer the following statement true (T) or false (F)
Introduction of nonnative marine species often occurs through release of ballast water in ports of call
Indicate whether the statement is true or false
Both Charles Darwin and Alfred Russel Wallace acknowledged the influence of the economist Thomas Malthus in the development of their ideas about natural selection. Specifically, Malthus' ideas about geometric population growth implied that:
A. resources in every generation would be limited, so individuals in every generation would have to compete for those resources. B. only the largest and strongest individuals would survive. C. organisms should have as many offspring as possible. D. organisms should have a few, very fit offspring who can compete for scarce resources. E. all of the answer options are correct.
The neurotransmitter acetylcholine induces vasodilation in intact blood vessels due to release of
A. nitric oxide from the endothelium. B. nitric oxide from the smooth muscle layer. C. nitric oxide from the lymphatic system. D. carbon monoxide from the endothelium. E. norepinephrine from the endothelium.