What makes up most of the mass of an individual mushroom?
a. underground mycelium
b. above ground mycelium
c. underground fruiting body
d. above ground ascocarp
e. underground ascocarp
A
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A ________ infection is one in which the virus quits reproducing and remains dormant for a period before becoming active again.
A. slow virus B. latent C. persistent D. None of the choices are correct.
Which of the following will increase the unloading of oxygen within the tissue?
A) increased hydrogen ion concentration only B) increased PCO2 only C) increased body temperature only D) both increased hydrogen ion concentration and increased body temperature E) increased hydrogen ion concentration, increased body temperature, and increased PCO2
A friend asks you for a definition of endemic because she is writing a history paper and this word keeps occurring in the literature in reference to bison on the Great Plains of the United States. Your response is that the word endemic means
A. a species that has coevolved with humans on Earth. B. a species that lives in only one area of Earth. C. a species that has gone extinct since humans have evolved on Earth. D. a species that exists in many habitats on Earth.
Consider the mechanism by which actin and tubulin polymerize. Which of the items below does not describe something similar about the polymerization mechanisms of actin and microtubules?
(a) Although both filaments can grow from both ends, the growth rate is faster at the plus ends. (b) Depolymerization initiates at the plus ends of filaments. (c) Nucleotide hydrolysis promotes depolymerization of filaments. (d) Free subunits (actin and tubulin) carry nucleoside triphosphates.