Explain why the northern United States experiences a cold season in winter and a warm season in summer.

Plankton consists of __________.

Which of the following pairs of biomes is characterized by relatively simple food webs (low biological diversity)?

Communities that exist in the aphotic zone ultimately depend on food manufactured by chemoautotrophic bacteria or __________.

In which of the following biomes would you expect decomposers to work most rapidly and efficiently?

Which of the following areas of study focuses on the exchange of energy, organisms, and materials between ecosystems?a. organismal ecologyb. landscape ecologyc. ecosystem ecologyd. community ecology

You have seen that Earth's terrestrial biomes reflect regional variations in climate. But what determines these climatic variations? Interpret the following diagrams in reference to how each represents effects on global patterns of temperature, rainfall, and winds. a. Solar radiation and latitude: b. Earth's orbit around the sun: c. Global patterns of air circulation and rainfall:

Name the five main levels of study in ecology from smallest to largest.

Which lake zone would be absent in a very shallow lake?a. benthic zoneb. aphotic zonec. pelagic zoned. littoral zone