General science

General science

A variety of science subjects concerning the fundamental knowledge about different aspects of our world and their underlying principles.

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General science

A major community of plants and animals having similar life forms or morphological features and existing under similar environmental conditions. The biome, which may be used at the scale of entire ...

Agar

Science; General science

A major constituent of the cell walls of certain red algae, especially members of the families Gelidiaceae and Gracilariaceae. Extracted for its gelling properties, it is one of three algal ...

Ostracoda

Science; General science

A major taxon of the Crustacea containing small bivalved animals 0.004–1.4 in. (0.1–33 mm) long, with most between 0.04 and 0.08 in. (1 and 2 mm). They inhabit aquatic environments in nearly all ...

Ecdysozoa

Science; General science

A major division within the animal kingdom containing the majority of animal species and comprising the phyla Priapulida, Kinorhyncha, and Loricifera (no common names), Arthropoda (insects, ...

Deuterostomia

Science; General science

A major division of the animal kingdom comprising the phyla Hemichordata, Echinodermata, and Chordata. Hemichordata consists of acorn worms (Enteropneusta) and a group of small-bodied, tentaculate ...

Precambrian

Science; General science

A major interval of geologic time between about 540 million years (Ma) and 3.8 billion years (Ga) ago, encompassing most of Earth history. The Earth probably formed around 4.6 Ga and was then ...

Paleozoic

Science; General science

A major division of time in geologic history, extending from about 540 to 250 million years ago (Ma). It is the earliest era in which significant numbers of shelly fossils are found, and Paleozoic ...