According to the theory of island biogeography, the islands with the most species will be
A) small and close to the mainland.
B) small and far from the mainland.
C) large and close to the mainland.
D) large and far from the mainland.
C
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The digestive system of most animals is lined with cells through which nutrients are absorbed. What is the embryonic origin of these cells?
A) endoderm B) ectoderm C) mesoderm
The portion of the body fluid contained in cells is
(a) interstitial fluid. (b) plasma. (c) intracellular fluid. (d) extracellular fluid.
Tamiflu is a common medication given for influenza treatment. It works by protecting and blocking sialic acid molecules on the surfaces of host cells and influenza virus envelopes as they leave the cell. Which statement reflects the mechanism of Tamiflu's action?
A. Tamiflu interferes with the metabolic properties of the virus. B. Tamiflu interferes with the release of the budding viruses from the infected host cells. C. Tamiflu interferes with the replication of +ssRNA from the -ssRNA genome of the flu virus. D. Tamiflu blocks protein synthesis of the viral genome.
The same neurotransmitter may produce either excitatory or inhibitory effects on postsynaptic neurons depending on the specific receptor type it binds.
Answer the following statement true (T) or false (F)