Organisms that demonstrate type I survivorship are
characterized by
a. high r, small offspring.
b. low r, small offspring.
c. low r, large offspring.
d. high r, large offspring.
e. low r, large population size.
Answer: c
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Which statement is NOT true?
a. Electrons closest to the nucleus are at the lowest energy level. b. No more than two electrons can occupy a single orbital. c. Electrons are unable to move out of the assigned orbital space. d. The innermost orbital holds two electrons. e. At the second energy level there are four possible orbitals with a total of eight electrons.
During respiratory exchange, carbon dioxide moves from the blood into the alveoli due to:
a. the presence of a permease, which removes carbon dioxide from the capillaries. b. potassium cotransport. c. diffusion down a concentration gradient.
d. the air pressure of dissolved oxygen, which forces it out. e. the contraction of the diaphragm, which creates a vacuum that pulls it out.
The cell membrane that surrounds all cells is said to be semipermeable. What does this mean?
A) Only particles of a substance that are small enough can pass through the cell membrane. B) The cell membrane consists of two layers of lipids with proteins that are either embedded in these layers or on the surface. C) The cell membrane always uses energy to transport particles of substances into and out of the cell. D) Only certain substances can pass through the cell membrane.
Individual encounters the same immunogen at a later date
A. Primary Response B. IgM C. Secondary Response D. IgG E. Latent Period F. 1st Exposure G. 2nd Exposure