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Mod D Unit 1 Les 3

Mod. D Unit 1 Lesson 3 Evidence of Common Ancestry

TermDefinition
Evolution is the process of biological change by which populations become different from their ancestors over many generations.
Bilateral Symmetry arrangement of an organism or part of an organism along a central axis, so that the organism or part can be divided into two equal halves.
Radial Symmetry a basic body plan in which the organism can be divided into similar halves by passing a plane at any angle along a central axis, characteristic of sessile and bottom-dwelling animals, as the sea anemone and starfish.
Asymmetrical Symmetry has two sides that don't match — it's uneven or out of whack.
Common Ancestor the idea that all organisms share a common ancestral species from which they evolved at some point in the past.
Anatomy of an organism is its body structure and its structural traits.
Embryo an unborn or unhatched offspring in the process of development.
Embryology The study of the development of unborn or unhatched organisms.
Created by: howellr