General

General

General nature or nature terms.

Industry: Natural environment

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General

protists

Biology; General

Single-celled organisms; a type of eukaryote. Protista

phylum

Biology; General

The broadest taxonomic category within kingdoms (pl.: phyla).

A subatomic particle in the nucleus of an atom that carries a positive charge. The positively charged (+1) subatomic particle located in the atomic nucleus and having a mass slightly less than that ...

phytochrome

Biology; General

A pigment in plant leaves that detects day length and generates a response; partly responsible for photoperiodism.

protostomes

Biology; General

Animals in which the first opening that appears in the embryo becomes the mouth; e.g., mollusks, annelids, and arthropods.

phytoplankton

Biology; General

A floating layer of photosynthetic organisms, including algae, that are an important source of atmospheric oxygen and form the base of the aquatic food chain.