DNA's shape is:

a. a helix.
b. a pentagon.
c. an octahedron.
d. a heptahedron.
e. a scalene triangle.


A

Biology & Microbiology

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If the stimulus is large enough at the trigger zone, the membrane potential reaches ____, and an action potential begins

a. positive charge b. maximum voltage c. resting potential d. threshold potential e. minimum ionic concentration gradient

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Describe the differences between DNA and RNA.

What will be an ideal response?

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Ecological models can be mathematical or they can be verbally descriptive

Indicate whether the statement is true or false

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Why is apoptosis potentially threatening to the healthy "neighbors" of a dying cell?

A) Cell death would usually spread from one cell to the next via paracrine signals. B) Lysosomal enzymes exiting the dying cell would damage surrounding cells. C) Bits of membrane from the dying cell could merge with neighboring cells and bring in foreign receptors. D) Neighboring cells would activate immunological responses.

Biology & Microbiology