The condition in which an organism's internal environment is kept stable in spite of changes in the external environment

An inherited behavior or physical characteristic that helps an organism survive and reproduce in its environment

A group of similar cells that perform a specific function

A body structure that is composed of different kinds of tissues that work together.

A body plan in which any number of imaginary lines that all pass through a central point that divide the animal into two mirror images

A body plan in which a single imaginary line divides the body into left and right sides that are mirror images of each other.

A radially symmetrical invertebrate that uses stinging cells to capture food and defend itself.

An invertebrate with a soft, unsegmented body; most are protected by a hard outer shell.

An invertebrate that has an external skeleton, a segmented body, and jointed appendages.

External skeleton; a tough, waterproof outer covering that protects, supports, and helps prevent evaporation of water from the body of many invertebrates.

A radially symmetrical marine invertebrate that has an internal skeleton and a system of fluid-filled tubes

An internal skeleton; structural support system with the body of an animal.

An animal that has a notochord, a nerve cord, and throat pouches at some point in its life.

A flexible rod that supports a chordate's back just below the nerve cord.

The bones that make up the backbone of an organism. In humans, one of the 26 bones that make up the backbone.

An animal whose body temperature is determined by the temperature of its environment.

An animal whose body temperature is regulated by the internal heat the animal produces

A vertebrate whose body temperature is determined by the temperature of its environment, and that lives in the water and has fins.

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Ch4

Question	Answer
homeostasis	The condition in which an organism's internal environment is kept stable in spite of changes in the external environment
adaptation	An inherited behavior or physical characteristic that helps an organism survive and reproduce in its environment
vertebrate	An animal with a backbone
invertebrate	An animal without a backbone
tissue	A group of similar cells that perform a specific function
organ	A body structure that is composed of different kinds of tissues that work together.
radial symmetry	A body plan in which any number of imaginary lines that all pass through a central point that divide the animal into two mirror images
bilateral symmetry	A body plan in which a single imaginary line divides the body into left and right sides that are mirror images of each other.
cnidarian	A radially symmetrical invertebrate that uses stinging cells to capture food and defend itself.
mollusk	An invertebrate with a soft, unsegmented body; most are protected by a hard outer shell.
arthropod	An invertebrate that has an external skeleton, a segmented body, and jointed appendages.
exoskeleton	External skeleton; a tough, waterproof outer covering that protects, supports, and helps prevent evaporation of water from the body of many invertebrates.
echinoderm	A radially symmetrical marine invertebrate that has an internal skeleton and a system of fluid-filled tubes
endoskeleton	An internal skeleton; structural support system with the body of an animal.
chordate	An animal that has a notochord, a nerve cord, and throat pouches at some point in its life.
notochord	A flexible rod that supports a chordate's back just below the nerve cord.
vertebra	The bones that make up the backbone of an organism. In humans, one of the 26 bones that make up the backbone.
ectotherm	An animal whose body temperature is determined by the temperature of its environment.
endotherm	An animal whose body temperature is regulated by the internal heat the animal produces
fish	A vertebrate whose body temperature is determined by the temperature of its environment, and that lives in the water and has fins.
cartilage
amphibian
reptile
bird
mammal
mammary gland
monotreme
marsupial
placental mammal
placenta

Created by: mperez985

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