Definitions
An animal without a backbone
What is an invertebrate?
The simplest kind of invertebrate that does not have symmetry
What is a sponge?
Warm-blooded vertebrate with feathers
What is a bird?
A frame that supports an animal's body and protects the internal organs
What is the skeletal system?
The stages of growth and change for an organism
What is an organism's life cycle?
Animals that warm their bodies in the Sun
What are cold-blooded animals?
A type of animal with soft bodies and hard shells.
What is a mollusk?
A cold-blooded vertebrate with moist skin that spends part of its live in water and part on land.
What is an amphibian?
The master control system of the body made of nerve cells.
What is the nervous system?
A way of acting that an animal does not have to learn
What is an instinct?
How long an organism is expected to live
What is a life span?
A type of animal that has tentacles and stinging cells.
What is a cnidarian?
A cold blooded vertebrate with dry skin that lives on the land
What is a reptile?
The system that brings oxygen to the blood and removes wastes from the blood.
What is the respiratory system?
The passing of traits from parent to offspring
What is heredity?
What are warm- and cold-blooded?
An animal with spiny skin and an internal support structure.
What is an echinoderm?
The three classes of fish
What are cartilaginous, jawless, and bony fish?
The system that moves blood throughout the body.
What is the circulatory system?
A series of different body forms that some animals grow through
What is metamorphosis?
An internal supporting structure
What is an endoskeleton?
What are flatworms, roundworms, and segmented worms?
The three groups of mammals
The system that removes wastes from the body.
What is the excretory system?
This is the stage of metamorphosis when a butterfly is in a chrysalis.
What is a pupa?