Phosphorus is an essential element in all living things and is a component of
A. ATP and DNA.
B. most amino acids.
C. nearly all vitamins.
D. carbohydrates.
Answer: A
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The two most important alcohol germicides are ________ and ________.
A. methanol; isopropanol B. ethanol; isopropanol C. methanol; butanol D. ethanol; methanol
When a "new" antigen first challenges the immune system, if the primary immune response produces B cells, what are the fates of those B cells?
I-Some of the B cells become plasma cells that secrete antibodies. II-Some of the B cells become memory cells and can produce a swifter response if the body encounters that particular antigen again. III-Some of the B cells secrete chemicals called pyrogens that travel to the brain inducing a fever. A. just II B. just I C. II and III D. I and II E. I, II, and III
The variable(s) in the 2005 peacock butterfly experiment is(are) the ____
a. butterfly wings pattern color b. butterfly species c. butterfly wings pattern color and sounds emitted d. rainforest region used e. percentage of survivors
Depletion of clotting proteins from the serum leads to the uncontrollable hemorrhaging seen in ________ infections
A) yellow fever virus B) malaria C) dengue virus D) Ebola virus E) Epstein-Barr virus