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42 Topic Pages Found in Biology and starting with the letter F
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Open Falcons

common name for members of the Falconidae, a heterogeneous family of long-winged birds of prey similar to the hawks but genetically more closely


In the broadest sense, a mixture of lipids – chiefly triglycerides (lipids containing three fatty acid molecules linked to a molecule of glycerol).

Fava bean

Broad bean or fava (faba) bean (also known as horse bean, field bean, tick bean or Windsor bean) ( Vicia faba L.) is a cool-season legume popular in

Open Fear

Fear may be the most important emotion for the survival of the human species. The experience of fear is the immediate subjective experience of

Open feather

Rigid outgrowth of the outer layer of the skin of birds, made of the protein keratin. Feathers provide insulation and facilitate flight. There are

Open Female Reproductive System
Female Reproductive System

Unlike the male, the female reproductive organs are sited entirely inside the body. Their function is to ripen and release an egg at regular


Looking like a bulbous celery heart, Florence fennel, or finocchio , is in fact the swollen base of the stem of the plant. It grows best in

Open fern

any plant of the division Polypodiophyta. Fern species, numbering several thousand, are found throughout the world but are especially abundant in

Open fertilization

In sexual reproduction , the union of two gametes (sex cells, often called egg or ovum, and sperm) to produce a zygote , which combines the genetic

Open Fetal alcohol syndrome
Fetal alcohol syndrome

Fetal alcohol spectrum disorders are a continuum of alcohol-induced fetal malformations. The severe end of this spectrum is a specific pattern of