Small molecules diffuse through the cytosol very efficiently by doing which of the following?
A.) binding to larger moleules
B.) taking the shortest path from one location to another
C.) forming noncovalent bonds with other molecules
D.) migrating along cytoskeletal microtubules
E.) moving randomly, knocked around by colliding with other molecules
Answer: E.) moving randomly, knocked around by colliding with other molecules
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If two individuals with different distinct characteristics are mated, their offspring is called a _______
A. strain B. true-breeding line C. gamete D. cross E. hybrid
A circulatory system in which the heart pumps blood to tissues throughout the body cavity is
A. a closed circulatory system. B. a gastrovascular cavity. C. an incomplete circulatory system. D. a complete circulatory system. E. an open circulatory system.
What is the oxidizing agent in the following reaction? Pyruvate + NADH + H+ ? Lactate + NAD+
A) NADH B) NAD+ C) lactate D) pyruvate
P. chromatophora secretes around itself a test, or case, of plates made of silica
Which of the following is another rhizarian that would be in competition with P. chromatophora for the silica needed to make these plates, assuming limited quantities of silica in the environment? A) radiolarians B) foraminiferans C) dinoflagellates D) diatoms