What Is Incomplete Metamorphosis? |Stages and Example
What is incomplete Metamorphosis? Incomplete metamorphosis is a type of metamorphosis in which an insect hatches from an egg and then goes through several nymphal …
Zoology
What is Coelom its Definition and Example?
Coelom Definition The coelom is a body cavity found in metazoa (animals that develop from an embryo with three layers of tissue: ectoderm, mesoderm, and …
Zooplankton: Definition, Types, and Example
Zooplankton Definition Zooplankton (pictured below) are a type of heterotrophic plankton that range from microscopic organisms to large species, such as jellyfish. Zooplankton are found within …
Zoology: Definition, History, Branches, and Careers
Zoology Definition Zoology, or animal biology, is the field of biology that involves the study of animals. The word zoology comes from the Greek words zōion, …
Vivisection: Definition, History, and Alternatives
Vivisection Definition Vivisection is the use of live animals in scientific experiments. The term comes from the Latin word vivus which means alive and the English word section meaning …
Threatened Species: Definition, Criteria, and Examples
Threatened Species Definition A threatened species is any species which is vulnerable, endangered, or critically endangered. The International Union for Conservation of Nature, or IUCN, is commonly referenced as a leading …
Tertiary Consumer: Definition, Function, and Example
Tertiary Consumer Definition A tertiary consumer is an animal that obtains its nutrition by eating primary consumers and secondary consumers. Usually tertiary consumers are carnivorous predators, although they may also …
Sexual Dimorphism: Definition, Overview, and Example
Sexual Dimorphism Definition Sexual dimorphism is when the genders of a particular species have different characteristics, not related to their sexual organs. On the other hand, a …
Sessile Definition
Sessile Definition Biologically speaking, an organism that is sessile (as opposed to motile) lacks the ability of self-locomotion and is predominantly immobile. In zoology, sessility applies to those animals …
Punctuated Equilibrium: Definition, Example, and Features
Definition Punctuated equilibrium is a theory that states that evolution occurs primarily through short bursts of intense speciation, followed by lengthy periods of stasis or equilibrium. …