a structure in the body that is composed of different kinds of tissue.
a characteristic that helps an organism survive in its environment or reproduce.
an animal that eats only plants.
an animal that eats only other animals.
a carnivore that hunts and kills other animals for food and has adaptations that help it capture the animal it preys upon.
an animal that a predator feeds upon.
an animal that eats both plants and animals.
an animal that does not have a backbone.
an animal with a backbone.
having one line that divides it into two halves
that are mirror images
having many lines of symmetry that all pass through a central point
Openings; such as in the body of sponges
The immature form of an animal that looks
very different from the adult.
Animals that have stinging cells and take
their food into a hollow central cavity
a vase-like shape and usually adapted for life attached to an underwater surface.
The cnidarian body plan characterized by a
bowl shape and which is adapted for a free-swimming life.
The ability to re-grow body parts
Flat worms with bodies soft like jelly,
planarians and tapeworms are examples
May be the most abundant animal life form
on earth; have cylindrical bodies, and have a digestive system that is a long open tube
The opening at the end of an organism's
digestive system, through which wastes exit
Earthworms for example; segmented worms have bodies made of many linked segments
An invertebrate with a soft, unsegmented body; most are protected by hard outer shells.
A major organ of the excretory system; eliminates urea, excess water, and other waste minerals from the body.
An organism's breathing organ that removes oxygen from water.
A flexible ribbon of tiny teeth in mollusks.
A mollusk with a single shell or no shell.
A mollusk that has two shells held together by hinges and strong muscles.
A mollusk with feet adapted to form tentacles around its mouth.