Plant cells permit ions and small molecules to move between adjacent cells by means of cytoplasmic channels in their
cell walls known as ____.
a. gap junctions
b. plasmodesmata
c. desmosomes
d. cell junctions
e. tonoplasts
ANSWER: b
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Based on what you know about this area, what would you expect to see in coral reef waters? A) slightly greater genetic diversity B) slightly smaller genetic diversity C) equal genetic diversity D) markedly greater genetic diversity E) markedly smaller genetic diversity
A polymerase chain reaction (PCR) copies an individual gene segment in vitro with a(n) ________ primer(s)
A) individual RNA B) individual DNA C) pair of RNA D) pair of DNA
An example of an obligatory mutualism involves which two organisms?
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Select the receptor mediated endocytosis events that are in the correct (before, after) order:a
Endosome fuses with lysosome; receptors are transported to plasma membrane and recycled. b. Ligand binds to receptors; coated vesicle forms by endocytosis. c. Contents are digested and released in the cymosely; ligand separates from its receptor. d. Endosome fuses with lysosome; receptors are transported to plasma membrane and recycled. e. None of the events are listed in the correct order