Turgor pressure involves
a. cell division.
b. cell expansion.
c. differentiation.
d. mitosis.
B
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Most of life's diversity is:
A. acellular. B. aerobic. C. microbial. D. terrestrial. E. aquatic.
Indicate which factors support the industrial melanism hypothesis. Check all that apply.
_____ Pollution inhibits the growth of dark colored lichen. _____ Dark moths have greater camouflage on trees in polluted woodlands. _____ Pollutants darken bark surfaces. _____ Light moths have greater camouflage on trees in highly polluted woodlands.
Threshold potential refers to the membrane potential required to:
A. open voltage-gated potassium channels. B. initiate an action potential. C. open voltage-gated sodium channels. D. initiate an action potential AND open voltage-gated sodium channels.
What is the role of calcium ions during contraction of a skeletal muscle?
What will be an ideal response?