Which of the following is not an emerging virus?
A. HIV
B. SARS
C. influenza
D. Epstein Barr
E. All of these choices are emerging viruses.
D. Epstein Barr
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What is the most likely consequence of a mutation that causes sporopollenin to degrade quickly after it is synthesized?
A. A reduction in the ability of pollinators to detect and transfer pollen grains to a stigma. B. A reduction in the ability of pollen and spores to disperse to new areas. C. A reduction in the ability of the integument of an ovule to develop into a seed coat. D. A decrease in the number of sperm that can be produced. E. A decrease in the ability of the pollen grain or spore to open when a suitable location is found.
Explain Gleason's individualistic model describing community structure What will be an ideal response?
Gene flow means most nearly the same as
a) genetic drift b) natural selection c) migration d) founder effect e) meiotic drive
Suppose you have two small plants. You cut the roots off of one and then place both plants in a jar of red dye. After 20 minutes, the roots, stem, and leaves of the plant with roots have turned pink. The plant without roots has not changed color at all
Why has the plant without roots remained a normal, green color? A) Cutting the roots has damaged the xylem, so the plant can no longer take up water. B) Cutting the roots has damaged the phloem, so the plant can no longer take up water. C) Cutting the roots has damaged the apical meristem, so the plant can no longer take up water. D) Cutting the roots has damaged the sporangia, so the plant can no longer take up water.