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Glossary of terms used on this site

Glossary of biology.

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Glossaries

Term Main definition
apex consumer
Glossaries - Biology glossary

organism at the top of the food chain

aphotic zone
Glossaries - Biology glossary

part of the ocean where no light penetrates

apical bud
Glossaries - Biology glossary

bud formed at the tip of the shoot

apical meristem
Glossaries - Biology glossary

meristematic tissue located at the tips of stems and roots; enables a plant to extend in length

apocrine gland
Glossaries - Biology glossary

scent gland that secretes substances that are used for chemical communication

Apoda
Glossaries - Biology glossary
apodeme
Glossaries - Biology glossary

ingrowth of an animal’s exoskeleton that functions as an attachment site for muscles

apomixis
Glossaries - Biology glossary

process by which seeds are produced without fertilization of sperm and egg

aposematic coloration
Glossaries - Biology glossary

warning coloration used as a defensive mechanism against predation

appendicular skeleton
Glossaries - Biology glossary

composed of the bones of the upper limbs, which function to grasp and manipulate objects, and the lower limbs, which permit locomotion

applied science
Glossaries - Biology glossary

form of science that aims to solve real-world problems

appositional growth
Glossaries - Biology glossary

increase in the diameter of bones by the addition of bone tissue at the surface of bones

aquaporin
Glossaries - Biology glossary

channel protein that allows water through the membrane at a very high rate

arachnoid mater
Glossaries - Biology glossary

spiderweb-like middle layer of the meninges that cover the central nervous system

arbuscular mycorrhiza
Glossaries - Biology glossary

mycorrhizal association in which the fungal hyphae enter the root cells and form extensive networks