Which of the following characteristics does not apply to members of Protheria?
a. nocturnal
b. insectivores
c. aquatic
d. placental mammals
e. some weigh less than 5 g
C
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Which statement best describes parasitism?
a. A parasite is harmful to the host. b. A parasite provides nutrients for the host. c. A parasite does not harm the host. d. A parasite does not receive any benefits from the host. e. A parasite always kills its host.
Humans can survive on Earth without biodiversity.
Indicate whether the statement is true or false.
In a fish population in a shallow stream, the genotypic frequency of yellowish-brown fish and greenish-brown fish changed significantly after a flash flood randomly swept away individuals from that stream. This change in genotypic frequency is most likely attributable to
a) gene flow b) disruptive selection c) directional selection d) genetic drift e) natural selection
Which of the following is an example of a mutagen?
A.) repair enzyme B.) triglyceride C.) UV sunlight D.) thymine