Aerobic respiration became established as a result of the evolution of ____

a. the first protocells
b. the first true cells
c. metabolism
d. the nuclear envelope
e. the oxygen-producing pathway of photosynthesis


ANSWER: e

Biology & Microbiology

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Which of the following are not transported in phloem?

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________ are associated with the "pinching in" of the cell membrane during cytokinesis.

Fill in the blank(s) with the appropriate word(s).

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Linda is studying the interaction between porcupines, pinion pine trees, and pine bark beetles

Over the course of her study in northern Texas, she observes the behaviors of 25 porcupines, records the location of 151 pinion pines, and traps 332 beetles. Her study encompasses _____ organisms and _____ population(s).

a. 508; 1 b. 3; 3 c. 508; 508 d. 508; 3 e. 3; 508

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A ball-and-socket joint connects _____

A) the radius to the ulna B) the radius to the humerus C) the ulna to the humerus D) the humerus to the scapula

Biology & Microbiology