Exam 23: Terrestrial Ecosystems

Deserts are typically hot throughout the year and rarely have freezing temperatures.

Tropical rain forests typically have a thick layer of litter on the forest floor.

Which of the following allocates the greatest amount of biomass to photosynthetic tissue and the least amount to supportive tissue?

What kind of trees dominate in ecosystems characterized by warm,wet climates with no distinct seasonality?

Tropical forests make up 6 percent of total land mass but contain an estimated ________ of all species on Earth.

Which of the following organisms are adapted to living in a desert?

Plants that root and grow on other plants in the tropical rain forest are called

The broad categories of grasses,shrubs,and trees represent a diverse range of species and characteristics,and they have fundamentally different patterns of

A belt of coniferous forest,known as ________ forest,occurs in the high latitudes of the Northern Hemisphere.

Classification of the world's major terrestrial biomes is based on the dominant forms of plant life.

Typical soils of the temperate forest region are

Vegetation that is sclerophyllous is adapted to areas with ample moisture and moderate temperatures.

Which of the following biomes contains permafrost?

The dominant biome in mediterranean climates found between 30° and 40° latitude is

Deeply weathered soils,with no distinct horizons characteristic of the tropical rain forest,are

A(n)________ is a biotic unit of plant formations and associated animal life based on the predominant plant types,with at least eight major terrestrial types.

Covering only 6 percent of the land surface,tropical rain forests account for more than 50 percent of all known plant and animal species.

Grazing ungulates are relatively common and burrowing rodents are relatively rare in temperate grasslands.

Arid environments that occur in the rain shadow of mountain barriers or are located far inland where moist maritime air rarely penetrates are referred to as ________.

Topographic features,such as mountains and valleys,influence the climate of a region.