biology

Any of various slender, threadlike nematode worms of the superfamily Filarioidea that are parasitic in vertebrates and are often transmitted as larvae by mosquitos and other biting insects.

variation in alleles of genes, occurs both within and among populations. Genetic variation is important because it provides the “raw material” for natural selection.

an animal lacking a backbone, such as an arthropod, mollusk, annelid, coelenterate, etc. The invertebrates constitute an artificial division of the animal kingdom, comprising 95 percent of animal species and about 30 different phyla. Compare with vertebrate .

It is the natural environment in which an organism lives, or the physical environment that surrounds (influences and is utilized by) a species population

is an organism that cannot fix carbon and uses organic carbon for growth.

crossbreed (individuals of two different species or varieties)

a colorless poisonous gas with a smell of rotten eggs, made by the action of acids on sulfides. • Chem. formula: H 2 S.

an eellike aquatic jawless vertebrate that has a sucker mouth with horny teeth and a rasping tongue. The adult is often parasitic, attaching itself

are annelids comprising the subclass Hirudinea. class clitellata

Kingdom: Animalia
Phylum: Chordata
Superclass: Tetrapoda
Class: Reptilia
Order: Squamata
Suborder: Lacertilia*
Günther, 1867

Migration refers to directed, regular, or systematic movement of a group of objects, organisms, people, or animals including

Kingdom: Animalia
Superphylum: Lophotrochozoa
Phylum: Mollusca

are a class of lipids and are a major component of all cell membranes as they can form lipid bilayers.

a classification of organisms consisting of related genera

a classification of animals consisting of closely related species

one of the three categories-animal, plant, and mineral- into which all organism and substances on earth were placed.

classification of organisms consisting of related families