Which observations of species distribution across Earth support the theory of common descent?

A) All continents contain nearly identical organisms.
B) Each part of Earth contains life forms perfectly designed for that region.
C) One can see similarities in organisms that are found in close proximity, but each population has adaptations that suit the organisms to their particular habitat.
D) There are very few similarities among life forms on different tropical islands.


C

Biology & Microbiology

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A) CD40-CK40L interaction B) cytokine-cytokine receptor interaction C) TH-B cell interaction D) All of these are necessary.

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Which system involves plasma proteins activated

when an organism’s pattern receptors become bound to anything? a. cytokine b. complement c. suppressor d. enhancer e. coagulation

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Which of the following is NOT involved in the

development of acne? a. excessive production of sebum b. Staphylococcus epidermidis c. dead skin cells d. hair follicles e. neutrophils

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Antisera directed against toxins are known as (antibodies/antitoxins/anti-antibodies)

What will be an ideal response?

Biology & Microbiology