When the cell begins to synthesize genetic material, it is in

 When the cell begins to synthesize genetic material, it is in S phase ( Synthesis phase ) of Cell Cycle.

Explanation: Cell cycle is process which leads to the synthesis of DNA and

formation to two daughter cells.

Cell cycle include two phases -:

1) Interphase -: It has three phases G1  ( this is gap phase where cell grows make organells ), S phase ( where synthesis of DNA takes place ) and G2 phase ( it is the second gap phase ).

2) Mitotic Phase- Formation of two daughter cells.

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the law of original horizontality explains:   why rocks appear in layers. correct answer: b the law suggests that all rock layers are originally laid down (deposited) horizontally and can later be deformed.   the principle is used by geologists to make assumptions about the relative ages of sedimentary rocks.