When potassium ion channels open, which of
the following occurs?
a. potassium ions flow into the axon
cytoplasm
b. the axon cytoplasm becomes more
positively charged
c. sodium ions diffuse into the axon
cytoplasm
d. all of these occur
e. none of these occur
E
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A composite organism consisting of a fungus
with either a cyanobacterium or green alga as a partner is called a
a. mycorrhiza. b. rust. c. lichen. d. mycelium. e. chytrid.
The cell in micrograph "I" is at which stage of the cell cycle?
a. prophase b. telophase c. interphase d. anaphase e. metaphase
You are given the task of designing an aquatic protist that is a primary producer. It cannot swim on its own, yet must stay in well-lit surface waters. It must be resistant to physical damage from wave action. It should be most similar to a(n) _____
A) diatom B) dinoflagellate C) apicomplexan D) red alga
Which of the following best describes the primary function of typical leaves?
A) anchoring B) photosynthesis C) shade D) storage of the sugars produced