DNA can be visualized as a ladder.  Which parts would be the rungs (where you step) and which would be the stringers (the sides where you hold on)? 

DNA replication occurs during which phase of the cell cycle?

Chlorophyll absorbs what color(s) of light?  

In addition to sunlight and carbon dioxide, algae growth requires   

.   Which molecules are produced by autotrophs during photosynthesis? 

Which of the following equations describes photosynthesis? 

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If a cell is irreparably damaged, it undergoes programmed cell death, called

A Body Mass Index of 31 is an indication of   

At maximum, an f subshell can hold ________ electrons, a d subshell can hold ________ electrons and a p subshell can hold ________ electrons.