Coral reefs

Coral reefs

Coral reefs are structures formed from the calcium carbonate secretions of corals. They are colonies of tiny animals in marine areas containing few nutrients.

Industry: Natural environment

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Coral reefs

Self-fertilization

Natural environment; Coral reefs

When a sperm cell and ovum from the same organism fuse and form a zygote.

Medusoid

Natural environment; Coral reefs

A body form resembling a medusa; umbrella shaped.

Race

Natural environment; Coral reefs

A population differing from others; refers to a unit below the subspecies level which is not given a taxonomic name.

A limestone terrain characterised by sinks, caverns, abrupt ridges, protuberant rocks and drainage characteristics due to greater solubility of limestone in natural waters than is common. The term is ...

Pustule

Natural environment; Coral reefs

A pimple- or wart-like projection; a bump or raised knob on the outside surface of a mollusk shell.

Marsh

Natural environment; Coral reefs

A soft, wet area periodically or continuously flooded to a shallow depth, usually characterised by a particular group of grasses, cattails and other low plants.

Centrolecithal

Natural environment; Coral reefs

A type of egg cell that has its yolk in the very centre of the cytoplasm, such that the initial meroblastic cleavage of the zygote happens all around the embryo. Most arthropods have centrolecithal ...