Evolution/ Invertebrate Vocabulary Part 1

Chordates with a backbone

Animals that lack a backbone

An organism that lives attached to the bottom or to a surface

An animal that feeds on particles suspended in the water

A suspension feeder that actively filters food particles

An animal that feeds on organic matter that settles on the bottom

Any of the small calcareous or siliceous bodies embedded among the cells of sponges or in the tissues of other invertebrates

The resistant fibers of sponges

The regular arrangement of similar body parts around a central axis

The stinging structure of cnidanans

The cylindrical, typically attached stage of cnidarians

The defined front end of a bilaterally symmetric animal

The defined rear end of a bilaterally symmetric animal

The upper or back surface of an animal with bilateral symmetry

The underside or belly surface of an animal with bilateral symmetry

A system that uses water pressure against the body wall to maintain body shape and aid in locomotion

A circulatory system where the blood or circulatory fluid is contained in district vessels

The presence of innate differences between life forms that are passed from parents to offspring

A mechanism of evolutionary change that results when individuals that are better adapted then others in the meeting the challenges of the environment produce more offspring

A change in gene’s DNA sequence to produce something different

Evolution in which two different species evolve similar structures because of similar life styles

The process by which interbreeding species diverged into two or more evolutionary groups

The process in which one species evolves in response to another

Modification of an organism or its parts that makes it more fit for existence under the conditions of its environment

A change in the genetic makeup of a species, usually as a result of natural selection favoring some individual characteristics over others

Any difference between the individuals in a species or groups of organisms of any species

When species reproduce many more offspring than can possibly survive