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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
Quantum models of speciation
Biology; Cell biology
Models of evolution that hold that speciation sometimes occurs rapidly as well as over long periods, as the classical theory proposed.
Prostaglandins
Biology; Cell biology
A class of fatty acids that has many of the properties of hormones; synthesised and secreted by many body tissues and have a variety of effects on nearby cells.
Prophase
Biology; Cell biology
1) The Þrst stage of mitosis during which chromosomes condense, the nuclear envelope disappears, and the centrioles divide and migrate to opposite ends of the cell. 2) The first stage of mitosis and ...
Prolactin
Biology; Cell biology
A hormone produced by the anterior pituitary; secreted at the end of pregnancy when it activates milk production by the mammary glands.
Prions
Biology; Cell biology
Infectious agents composed only of one or more protein molecules without any accompanying genetic information.
Progesterone
Biology; Cell biology
One of the two female reproductive hormones secreted by the ovaries.
Principle of segregation
Biology; Cell biology
Mendel's Þrst law; holds that each pair of factors of heredity separate during gamete formation so that each gamete receives one member of a pair.
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