Both Staphylococcus aureus and Streptococcus pyogenes have fibronectin-binding proteins
Indicate whether this statement is TRUE or FALSE.
TRUE
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What would happen if an enzyme inhibitor for the enzyme photodiesterase (PDE) was applied to a vertebrate eye?
A) The opsins found in cones would not be differentiated into the red, blue, and green proteins, causing the animals to be color blind. B) The cGMP-gated sodium channels would remain open, glutamate would be continuously discharged at the synapses, and the brain would not detect light absorbed by the rod cells. C) The lens could not be appropriately adjusted to focus light on the retina, resulting in either nearsightedness or farsightedness. D) All of the listed responses are correct.
All members of a species that reside within an ecosystem make up a(n)
A) ecotone. B) population. C) aggregation. D) community. E) trophic level.
Choose the correct statement regarding estrous and menstrual cycles.
A. The lining of the uterus is shed during menstruation and estrous. B. Copulation can only occur during ovulation in the menstrual cycle. C. Ovulation only occurs in animals with a menstrual cycle. D. Menstrual cycles are longer than estrous cycles. E. Animals with estrous cycles are sexually receptive only when they are ovulating.
The most common infectious cause of death worldwide is
A. HIV/AIDS. B. heart disease. C. stroke. D. cancer. E. malaria.