What do the polar bears, reindeer, and shrubs that live in a single area make up?
organism
population
community
ecosystem

What does it mean if an area has high biodiversity? select one: a. different organisms live in the world b. lots of different organisms live an ecosystem c. lots of the exact same organisms live in an ecosystem

Tlymphocytes mature in the? a. thyroid gland. b. bone marrow. c. spleen. d. thymus.

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.