Glossary

o
Old World - 

Animals from Asia and Africa. For example, Old WorldAnimals from Asia and Africa. For example, Old World monkeys are those native to Asia or Africa. monkeys are those native to Asia or Africa.

Olfactory - 

The sense of smell.

Omnivore - 

An animalAny living thing that is not a plant. Most animals can move about freely. All use plants or other animals as food. All have sensory organs. that eats all kinds of foods, both plants and animals.

Opposable thumb/toe - 

The first digit can be moved so that it can touch each of the other digits. It is used to grasp items.

Organic - 

Something that is raised or grown without synthetic fertilizers, pesticides, or drugs.

Organism - 

Anything that is alive.

Ornamental plumage - 

On a birdAn animal that has wings and is covered with feathers. Birds have a backbone, are warm-blooded, produce young from eggs, and walk on their two legs. Most can fly., colorful feathers that do not blend into the surrounding environmentEverything that surrounds an animal or other living thing. For example, a pond is a frog's environment. as camouflageThe color or pattern of an animal's covering that is similar to the animal's surroundings, and therefore helps hide it. May also be related to smell, as in lions rolling in elephant dung to camouflage their scent.. These colors are often used to attract a mate.

Ossicones - 

Hair-covered hornsGrowths on the head of an antelope, cow, sheep, or goat that are never shed. found on the heads of giraffes. OssiconesHair-covered horns found on the heads of giraffes. Ossicones are made of bone and are part of the skull. are made of bone and are part of the skull.

Oviparous - 

Producing eggs that develop and hatch outside the body.

Ovoviviparous - 

Producing young from eggs that hatch inside the body. Some snakes, such as the common boa, give birthThe beginning of an animal's life. this way.