Which of the following sentences BEST explains the meaning of biotic factors?

Which ecosystem is a mixture of fresh water and salt water?

All the sea gulls of a species that occur together at the beach in the summer are called _______________.

A(n) __________________ includes all living and nonliving things that interact in an environment.

A(n) _________________________ is one, single member of of a species. For example, one wolf that belongs to a pack of wolves in a forest ecosystem.

________________ ecosystems are land-based and include forests, grasslands, deserts, taiga, and tundra.

______________ ecosystems are water-based and include freshwater lakes, ponds, and rivers; salt water oceans, coral reefs, estuaries, and saltwater marshes.

Which terrestrial ecosystem is being described below?

Description: flat open ground that is always frozen and cold all year. Few plants grow here, but includes animals such as caribous, polar bears, snow owls, and artic foxes. Antarctica is an example of this ecosystem.

___________________ ecosystems are involved in the regulation of the water cycle and climate formation. These biomes are some of the largest in the world.