Science Chapter 10 Vocabulary

Study for the test

symmetry

The property of an object means that it can be divided by one or more imaginary lines into mirror image halves.

notochord

A flexible rod found in chordates animals.

vertebrate

An animal with a backbone

invertebrate

An animal that lacks a backbone.

endotherm

An animal that can regulate its internal body temperature.

ectotherm

An animal with a body temperature that is determined by its environment.

baraminology

The effort to define the boundaries between the various created kinds of animals.

sponge

One of a group animals with no symmetry, cephalization, or gut

cnidarian

One of a group of animals with stinging cells, called cnidocytes, including jellyfish

echinoderm

One of a group of animals with spiny skin, including sea stars, sea urchins, and sea cucumbers.

mollusk

One of a group of animals which soft bodies and usually a shell, including snails, octopuses, and clams.

arthropod

One of the large group of animals which jointed appendages and exoskeleton

exoskeleton

A support structure on the outside of animals body.

endoskeleton

A living internal support structure

amphibian

An ectothermic verterbrate that usually lives in water when young and on land as an adult.

placental mammal

An mammal that provides its embryo with oxygen and food through a structure called the placenta.

marsupial

an mammel with a pouch in which to raise its young.