B. they are both unicellular
Hydrocarbons. (organic compounds entirely made up of hydrogen and oxygen)
Retina allows the eye to regulate how much lint can enter.
<span>A light microscope uses focused light and lenses to magnify an object. Light microscopes come in several forms. (1) Simple light microscopes use a single lens to magnify an object and cannot reach high magnification just like a handheld lens whose highest clear magnification in the best conditions is 25x. (2) Compound light microscopes use two sets of lenses - an objective lens and an eye piece. This is the type of light microscope whose magnification power reaches between 1000x and 2000x.</span>
It requires energy when a substance must travel against a concentration gradient through the membrane
