General

General

General nature or nature terms.

Contributors in General

General

In seed plants, a protective structure in which the female gametophyte develops, fertilization occurs, and seeds develop; contained within the ovary. Structures inside the ovary of the flower within ...

ovum

Biology; General

The female gamete, egg.

oxidation

Biology; General

The loss of electrons from the outer shell of an atom; often accompanied by the transfer of a proton and thus involves the loss of a hydrogen ion. The loss of electrons or hydrogens in a chemical ...

oxytocin

Biology; General

A peptide hormone secreted by the posterior pituitary that stimulates the contraction of the uterus during childbirth.

ozone

Biology; General

A triatomic (O3) form of oxygen that is formed in the stratosphere when sunlight strikes oxygen atoms. This atmospheric ozone helps filter radiation from the sun.