If one compares the forearm of a human, dog, bird, and whale and finds that they indicate common ancestry, what would we call these structures?

a. vestigial structures
b. archetype features
c. homologous structures
d. ancestral forms


c. homologous structures

Biology & Microbiology

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When primary producers expend energy to build new tissue, this is _____

A) net primary productivity B) the amount of energy available to consumers C) maintenance costs D) net primary productivity and the amount of energy available to consumers E) maintenance costs and the amount of energy available to consumers

Biology & Microbiology

Lipopolysaccharide of the outer membrane of gram-negative cell walls is called ________.

A. enterotoxin B. leukocidin C. exotoxin D. hemolysin E. endotoxin

Biology & Microbiology

To determine the role of mimicry in the behavior of the tephritid fly Zonosemata vittigera and the jumping spider Phidippus apacheanus, Greene and colleagues (1987 ) conducted carefully controlled experiments to correlate appearance and behaviors

with the deterrence of predation. What two factors were found important in preventing predation of the tephritid fly by the jumping spiders?

Biology & Microbiology

Ig stands for __________.

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

Biology & Microbiology