An organism has the following characteristics: It is multicellular.

It is composed of eukaryotic cells that are organized into tissues, but lack cell walls.

It obtains its nutrients by ingestion.

It reproduces by sexual reproduction.

To which Kingdom does the organism mostly belong?

What is thought to have caused the mass extinction at the end of the cretaceous period?

The pharynx is the structure in the body that serves as a pathway of both air and food. how does the body make sure that food does not get into the lungs? the salivary glands secrete enzymes that pull food out of the air pathway. the small intestine pushes the air out of the digestive system. the pancreas breaks down food in the air pathway. the epiglottis closes the air pathway so that food will not enter it.

Aristotle classified animals according to their a. habitat and mating behavior c. mating behavior and relatedness b. habitat and physical differences d. physical differences and mating behavior