Homeostasis provides what kind of internal environment?

A. Positive
B. Stable
C. Limiting
D. Changing
E. Chemical and physical


Answer: B

Biology & Microbiology

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The Lac repressor protein binds to the:

A. operator in the presence of allolactose. B. lacZ gene in the presence of allolactose. C. operator in the absence of allolactose. D. operator regardless of the presence or absence of allolactose.

Biology & Microbiology

After the second meiotic division, the number of chromosomes in each daughter cell is ________ that of the original parental cell.

A) half B) double C) the same as D) quadruple

Biology & Microbiology

Identify the numbered items in the accompanying figure. Include the following terms in your description


? presynaptic neuron
? postsynaptic neuron
? neurotransmitters waiting to be released
? neurotransmitters released by the nerve impulse
? synapse
? receptors with bound neurotransmitters

Biology & Microbiology

The ________ of the retina, which is responsible for acute vision, has densely packed cone cells.

A. otolith B. fovea centralis C. tectorial membrane D. blind spot E. ampulla

Biology & Microbiology