When sodium ions diffuse into the axon’s
cytoplasm, the cytoplasm becomes
a. more positively charged.
b. more negatively charged.
c. neutrally charged.
d. impermeable to more sodium ions.
e. more than one of these
A
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A substance that in some way harms the health, activities or survival of a population is a(n)
a. pollutant. b. nonrenewable resource. c. ecological footprint. d. reservoir. e. limiting factor.
Cloned animals are typically not entirely genetically identical to their cloned parent. Why?
What will be an ideal response?
Which of the following types of RNA is typically found as a strand that is about 75 to 90 bases long and folds into a structure with four double-helical segments?
a. tRNA b. snRNA c. pre-mRNA d. rRNA
Organic compounds are degraded to produce methane by (Archaea/fungi/Pseudomonas).
Fill in the blank(s) with the appropriate word(s).