Exam 16: Ecosystems and Biomes

In the history of planet Earth, there have been ________ major extinctions.

Deep tap roots, waxy leaf coatings, and succulence are all adaptations to

Today, more than half of the cultivated land in the U.S. and Canada is planted for animal consumption. This means that more people could be fed if the land were planted with crops for direct human consumption.

Trees in the tropical rain forest have ________ root systems because ________.

Which of the following does $\underline { \text { not } }$ usually occur with ecological succession?

The loss of species throughout the world constitutes a loss of biodiversity, which represents a ________ in ecosystem stability and a ________ in productivity.

Fire is always harmful to an ecosystem.

Which of the following is not a characteristic of much of the vegetation in the tropical savanna?

Soils in a tropical rain forest are

The most recent major extinction of species on Earth has been caused by humans.

The northern border of the midlatitude broadleaf and mixed forest is characterized by

The pines of the southeastern United States are characteristic of which biome?

A study of the dietary requirements of African elephants in a savanna environment, and the role the elephants play in that environment, would be an example of a topic studied in

Which of the following specifically relate to the rain forest biome?

Compared to rain forest soils, the tropical savanna soils are ________ for agriculture because ________.

Chlorophyll ________ green light.

Lush forests of middle and high latitudes occurring along narrow margins of the Pacific Northwest, southern China, and limited areas of southern Japan fall within the biome named

Alexander von Humboldt first proposed the idea that plant communities change with altitude just as they do with latitude. This is known as the

The destruction of Earth's equatorial rain forests cannot be discerned from orbit.

Deserts cover approximately ________ percent of Earth's land area.