Wet and dry seasons in tropical deciduous forests are ultimately caused by __________.

In the climograph below, biomes are plotted by their range of annual mean temperature and annual mean precipitation. Identify the following biomes: arctic tundra, coniferous forest, desert, grassland, temperate forest, and tropical forest. Explain why there are areas in which biomes overlap on this graph.

An ecologist might conduct research to answer which of the following questions?

Why are many of the world's deserts located at latitudes between 30°N and 30°S?

When people speak of the rain shadow of the California Coast Range, what are they referring to?

The warming of the Earth is a(n) __________ effect. People are worried that it will have a(n) __________ effect, perhaps causing the extinction of a number of species.

Which of the following statements about biomes is correct?

A climograph shows the mean temperature and precipitation values that support different biomes. What information is missing that would help predict what biome should be found in a particular range?

Different species that inhabit the same type of biome but occur in widely separated geographic regions often appear similar due to __________.