The gray-black, filamentous, haploid mycelium growing on bread is most likely what kind of organism?
a) zygomycete
b) basidiomycete
c) chytrid
d) deuteromycete
e) ascomycete
Answer: a) zygomycete
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Most halobacteria are motile by means of lophotrichous flagella
Indicate whether the statement is true or false.
The giant squid axon has been used extensively in research to determine the mechanisms by which neurons generate electrical signals. Scientists used microelectrodes to measure the resting membrane potential (inside relative to outside) and discovered a difference of
A. -70 mV. B. 300 mV. C. -300 mV. D. 70 mV. E. 0 mV.
A mass extinction, in which the dinosaurs disappeared from Earth, occurred approximately ____ years ago
a. 6500 b. 65,000 c. 650,000
d. 65,000,000 e. 650,000,000
Which best explains how Australia has distinctive organisms, such as marsupials, that cannot be found anywhere else
on Earth? a. Australia has an unusual climate that has triggered natural selection. b. There are fewer species of organisms in Australia than most continents. c. Australia experienced a significantly slower rate of evolutionary change. d. The predators of marsupials eliminated the populations in other locations. e. Australia was separated and isolated from other land masses for a long period of time.