The sequence of decreased death rate followed by a decrease in birthrate is called

A. environmental resistance.
B. demographic transition.
C. doubling time coefficient.
D. replacement reproduction.
E. a limiting factor.


Answer: B

Biology & Microbiology

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The most abundant component of plasma is water.

Answer the following statement true (T) or false (F)

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A viticulturist wants to grow larger grapes. Which specific hormone would a viticulturist apply to the plants?  

A.  auxin B.  cytokinin C.  gibberellin D.  abscisic acid E.  ethylene

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Amoeba is a term used to describe unicellular protists that move by means of flagella

Indicate whether the statement is true or false.

Biology & Microbiology

Organic molecules have a carbon backbone and ________ such as -OH and -NH2 that affect their chemical properties.

A. chemical groups B. R groups C. extension groups D. functional groups

Biology & Microbiology