section 1 what is an animal chapter 9

cell

(biology) the basic structural and functional unit of all organisms

How are animals classified?

1.by how they are related to other organisms 2.by animal body structure 3.by the way the animal develops 4.DNA

vertebrate

An animal with a backbone

invertebrate

An animal without a backbone

Why is movement important to organisms?

Meeting the basic needs of survial and reproduction

adaptation

a behavior or physical characteristic that allows an organism to survive or reproduce in its environment

tissue

a group of similar cells that perform the same function

asexual reproduction

a reproductive process that involves only one parent and produces offspring that are identical to the parent

sexual reproduction

a reproductive process that involves two parents that combine their genetic material to produce a new organism, which differs from both parents

organ

a structure in the body that is composed of different kinds of tissue

How do animals obtain food?

eating other organisms

phylum

one of the major groups into which biologists classify members of a kingdom

How are animal bodies typically organized?

the cells cells of most animals are organized into higher levels of structure, including tissue, organs, and systems

fertilization

the joining of a sperm cell and an egg cell

What are four major functions of animals?

the major functions of animals are to obtain food and oxygen and water, keep internal condititions stable, move, and reproduce