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Cell biology
The study of cell structure, physiological properties, interactions with the environment and life cycle.
Industry: Biology
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Cell biology
active transport
Biology; Cell biology
Transport of molecules against a concentration gradient (from regions of low concentration to regions of high concentration) with the aid of proteins in the cell membrane and energy from ATP.
ecological niche
Biology; Cell biology
The role an organism occupies and the function it performs in an ecosystem; closely associated with feeding.
chorion
Biology; Cell biology
The two-layered structure formed from the trophoblast after implantation; secretes human chorionic gonadotropin.
seed coat
Biology; Cell biology
The tough outer layer of the seed, derived from the outer layers of the ovule.
leaf primordia
Biology; Cell biology
Young leaves, recently formed by the shoot apical meristem, located at the tip of a shoot.
primary body
Biology; Cell biology
Those parts of a plant produced by the shoot and root apical meristems.
sympathetic system
Biology; Cell biology
The subdivision of the autonomic nervous system that dominates in stressful or emergency situations and prepares the body for strenuous physical activity, e.g., causing the heart to beat faster.