Pinching in of fluids by a unicellular organism is the process of

Pinching in of fluids by a unicellular organism is the process of pinocytosis or fluid endocytosis. The cell takes in surrounding fluids, including all of the substances available, without differentiating. It is a non-specific process. The membrane of the unicellular organism elongates, captures the fluid and small vesicles are pinched off intracellularly. These vesicles then are processed by the organelles of the cell.

Explanation:

The carbon atoms used to build carbohydrate molecules comes from carbon ... RuBP has five atoms of carbon and a phosphate group on each end. ... molecule has six carbon atoms, it takes six turns of the Calvin cycle to make one ... Click Stage 1, Stage 2, and then Stage 3 to see G3P and ATP regenerate to form RuBP. hope that helps