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