According to the redundancy hypothesis, species are redundant if
A. they could be eliminated or replaced by others with no loss of ecosystem function.
B. they have grown beyond their carrying capacity for a particular ecosystem.
C. their ecological niche overlaps somewhat with another species.
D. they have an effect on the ecosystem that is disproportionate with their abundance.
A. they could be eliminated or replaced by others with no loss of ecosystem function.
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Which nucleotide forms the tail of a completed
messenger RNA transcript?
a. adenine b. thymine c. cytosine d. guanine e. a combination of more than one of these
Which statement about the geologic time scale is
incorrect? a. Mammals originated early in the Mesozoic era. b. Adaptive radiation of flowering plants, insects, and birds took place during the Mesozoic era. c. Mass extinction of the dinosaurs occurred about 65 million years ago. d. Reptiles originated during the Paleozoic era. e. Eukaryotes originated during the Proterozoic eon.
A cell that is anchorage-dependent for growth will also exhibit contact inhibiton.
a. true b. false
The cross GE/ge × ge/ge produces the following progeny: GE/ge 404; ge/ge 396; gE/ge 97; Ge/ge 103. From these data one can conclude that ________
A) the recombinant progeny are GE/ge and GE/ge B) the recombinant progeny are gE/ge and Ge/ge C) the recombinant progeny are gE/GE and GE/ge D) the recombinant progeny are GE/GE and ge/ge E) the recombinant progeny are Ge/Ge and gE/gE