You find an animal that has a flexible cuticle, longitudinal muscles, a complete digestive system, and a false coelom. What is its most likely identity?
A. A nematode
B. A cnidarian
C. A flatworm
D. An echinoderm
E. A sponge
Answer: A
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The MONOPTEROUS gene in Arabidopsis encodes a protein that is similar in its function to which animal protein?
A) MyoD in frog embryos B) Bicoid in fruit-fly embryos C) keratin in human embryos
After digesting a DNA sequence, a restriction endonuclease can generate
A) blunt ends. B) overhangs. C) sticky ends. D) blunt ends, overhangs, or sticky ends.
A group of AIDS patients and their families is exposed to the fungus Pneumocystis carinii. There is great concern among the individuals. You have been asked to address the situation. Explain what you would say to the group to give them a plausible treatment strategy.
A. Those with AIDS should not be concerned. This fungus is the cause of AIDS--they already have the fungus. B. Those with AIDS should be concerned as this fungus attacks T-cells in the same way as does AIDS and thereby increases the severity of the disease. C. Those with AIDS should not be concerned, as the fungus attacks the AIDS pathogen and thereby reduces the severity of the disease. D. Those with AIDS should be concerned as the fungus infects individuals whose immune system has been weakened by AIDS and causes pneumonia.
The splitting of water and the generation of oxygen occur where?
A. The Krebs Cycle B. Photosystem I C. The Calvin Cycle D. Photosystem II