A tapeworm living in a person's intestine is
A. a vector.
B. an internal parasite.
C. a mutualistic organism.
D. a predator.
B. an internal parasite.
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The structure(s) that easily distinguishes a plant cell from an animal cell is/are
_____ chloroplasts. _____ nucleus. _____ cell wall. _____ the Golgi apparatus.
An arthropod embryo has ________ germ layer(s)
A) no B) one C) two D) three E) four
A physician specializes in surgery involving the following group of organs: mouth, esophagus, stomach and intestines. Overall, this physician is specialized at which level of organization?
(a). cell (b). tissue (c). organ (d). organ system (e). organism
The study of patterns in the geographical distribution of species is called ________
a. evolutionary biology b. biodiversity c. biogeography d. population genetics