An immature frog (a tadpole) lives in a pond or lake. However, the adult frog possesses special adaptations that permit it to survive in a terrestrial environment. These special adaptations __________.

Permafrost is characteristic of the __________.

Which biome is the largest terrestrial biome on Earth?

Cattle egrets, originally only found in Africa and southwestern Europe, can now be found in North America because of which of the following?

Which of the following choices correctly pairs a terrestrial biome with some of its characteristics?

Which of the following biomes is dominated by gymnosperm or conifer trees (pines, firs, spruces)?

Of these biomes, vertical stratification (layers of plants) is most pronounced in the __________.

In a rather infamous case of species transplantation, starlings were introduced into North America from Europe in 1890 by an eccentric Shakespeare fan. Though the actual range of starlings was originally in the Eastern Hemisphere, it is clear that North America was part of its __________ range.

What is the importance of turnover in temperate lakes?