amphibians: A group of animals that consists of frogs, salamanders and caecilians. Amphibians have backbones and can breathe through their skin. Contrary to reptiles, birds and mammals, unborn or unhatched amphibians do not create in a special protecting sac termed an amniotic sac.

breed: (verb) To develop offspring by means of copy.

caecilian: A kind of amphibian that has no legs. Caecilians have ring-shaped folds of skin termed annuli, smaller eyes protected by skin and at times bone, and a pair of tentacles. Most of them live underground in the soil, but some expend their full life in h2o.

produce: To emerge or to make come into remaining, either in a natural way or by way of human intervention, this sort of as by producing. (in biology) To improve as an organism from conception as a result of adulthood, generally undergoing alterations in chemistry, measurement, psychological maturity, dimension or from time to time even shape. (as with cities) The conversion of wildland to host communities of persons. This development can include the constructing of roads, homes, retailers, colleges and far more. Typically, trees and grasslands are cut down and replaced with structures or landscaped yards and parks.

ectotherm:  This is an animal that depends on exterior sources to manage its physique temperature. Their overall body temperatures modify with that of their atmosphere.

egg: The unfertilized reproductive mobile produced by girls.

ecosystem: The sum of all of the things that exist close to some organism or the method and the problem all those points produce. Setting might refer to the weather conditions and ecosystem in which some animal life, or, perhaps, the temperature and humidity (or even the placement of points in the vicinity of an product of fascination).

fetus: (Adj. fetal ) The time period for a mammal or other massive animal during its later-phases of enhancement in the womb. For people, this term is commonly applied just after the eighth 7 days of advancement.

gills: The respiratory organ of most aquatic animals that filters oxygen out of water. Fish and other h2o-dwelling animals use gills to breathe.

an infection: A sickness that can unfold from one particular organism to a different. It’s usually triggered by some sort of germ.

larvae: Immature bugs that have a distinctly unique sort (physique shape) than when they are older people. For occasion, caterpillars are larval butterflies and maggots are larval flies. (Often this term also is applied to describe such a stage in the improvement of fish, frogs and other animals.)

limb: (in physiology) An arm or leg. (in botany) A massive structural portion of a tree that branches out from the trunk.

mammal: A warm-blooded animal distinguished by the possession of hair or fur, the secretion of milk by ladies for feeding their younger, and (usually) the bearing of reside younger.

metamorphosis: A spectacular improve from 1 stage in an animal’s lifetime background to the future, such as the process by which a tadpole turns into a frog or the modifications that transform a caterpillar into a butterfly.

oxygen: A gasoline that helps make up about 21 p.c of Earth’s ambiance. All animals and lots of microorganisms will need oxygen to gasoline their advancement (and metabolic process).

reptile: Cold-blooded vertebrate animals, whose pores and skin is coated with scales or attractive plates. Snakes, turtles, lizards and alligators are all reptiles.

species: A team of equivalent organisms capable of developing offspring that can survive and reproduce.

tetrapod: A four-limbed animal, which includes amphibians, reptiles, birds and mammals.

vertebrate: The team of animals with a mind, two eyes, and a rigid nerve wire or spine managing down the back again. This team contains amphibians, reptiles, birds, mammals and most fish.