An isotope is an atom of an element that varies in mass number due to variation in the number of 

A. atoms.
B. protons.
C. neutrons.
D. electrons.


C. neutrons.

Biology & Microbiology

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In lactate fermentation, ____ is converted into lactate

a. pyruvate b. acetaldehyde c. ethanol d. glucose e. NADH

Biology & Microbiology

Sharks excrete a small volume of dilute urine

____________________ Indicate whether the statement is true or false.

Biology & Microbiology

The resting potential of a typical neuron is approximately +70 mV

____________________ Indicate whether the statement is true or false.

Biology & Microbiology

A ________ group consists of the most recent common ancestor and all of its descendants.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology