The term immunity comes from the Latin immunis, which means
a. protect.
b. exempt.
c. attack.
d. sword.
e. cow.
B
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Which trait is least likelyto be shared between green algae and land plants?
a. presence of stomata b. chloroplasts with chlorophyll a c. cellulose in their cell walls d. store energy captured during photosynthesis as starch e. chloroplasts with chlorophyll b
Long-term exposure to cold can alter metabolism and encourage __________ in which brown adipose tissue produces
heat. Fill in the blank(s) with the appropriate word(s).
A female fly, full of fertilized eggs, is swept by high winds to an island far out to sea. She is the first fly to arrive on this island, and the only fly to arrive in this way. Thousands of years later, her numerous offspring occupy the island, but none of them resemble her. There are, instead, several species each of which eats only certain type of food. None of the species can fly, for their flight wings are absent, and their balancing organs (i.e., the halteres) are now used in courtship displays. The male members of each species bear modified halteres that are unique in appearance to their species. Females bear vestigial halteres. The ranges of all of the daughter species overlap. If the males' halteres have species-specific size, shape, color, and use in courtship displays, and if
the species' ranges overlap, then the speciation events may have been driven, at least in part, by which of the following? A) autopolyploidy B) allopolyploidy C) species selection D) sexual selection E) habitat differentiation
The first animals evolved from ________.
A. bacteria B. archaea C. plants D. protists