An animal that has a high surface-area-to-volume-ratio of the body, and takes in all the oxygen it needs through its outer epithelium is most likely which of the following?

A. a fish
B. an earthworm
C. a mammal
D. an insect
E. a snake


Answer: B. an earthworm

Biology & Microbiology

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Which rickettsial disease can be transmitted by contaminated milk?

A) ehrlichiosis B) typhus C) Q fever D) Rocky Mountain spotted fever

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Neanderthals were members of

a. Australopithecus robustus. b. Homo habilis (early Homo). c. Homo erectus. d. Homo sapiens. e. none of these.

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Individual "A" produces 10 offspring, 8 of whom survive to adulthood. Individual "B" (a member of the same population) produces 15 offspring, 7 which survive to adulthood. Based on the concept of natural selection, individual "A" has the higher fitness.

Answer the following statement true (T) or false (F)

Biology & Microbiology

What type of trait is the result of the expression of two or more genes?

a. pleiotropy b. polygenic c. codominance d. penetrance e. multifactorial

Biology & Microbiology