Which environment is most likely to support the largest number of active protists?

a. the surface of a glacier
b. an arid desert
c. a warm fresh-water lake
d. an extremely acidic hot spring


c. a warm fresh-water lake

Biology & Microbiology

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The cold adaptation of the octopus nervous system ____

a. is a feature of all octopus species b. is caused by Na+ ion flow out of the neurons c. relies on the temperature sensitivity of K+ channels in neurons d. is caused by K+ ion flow into the neurons e. relies on the temperature sensitivity of Na+ channels in neurons

Biology & Microbiology

Which area of a mountain would be expected to receive the most precipitation?

A) the peak B) leeward side C) windward side D) north slope

Biology & Microbiology

Why is the symbiotic relationship of truffle mushrooms and tree roots considered to be crucial to the colonization of land?

A) This relationship is found in some of the oldest plant fossils. B) Truffles have the terrestrial adaptation of seeds. C) Tree roots can be found only in terrestrial environments. D) Truffles provide trees with sugars.

Biology & Microbiology

Common mushrooms and puffballs belong to the phylum of fungi called:

a. Basidiomycota b. Ascomycota c. Zygomycota d. Deuteromycota

Biology & Microbiology