Cells and Life Processes

Movement of substances against a concentration gradient using energy.

The real size of an object.

a structural feature that enables a cell to perform its function effectively.

A stem cell found in developed tissues that usually produces a more limited range of cells.

Tiny air sacs in the lungs where gas exchange occurs.

The stage when sister chromatids separate and move toward opposite ends.

the basic structural and functional unit of animals.

A molecule that provides usable energy for cellular processes.

A non-cancerous tumour that does not invade nearby tissues or spread to distant sites.

Removal of a tissue sample for examination.