Exam 3: Ecosystems: What Are They and How Do They Work

Specialized bacteria can produce their own food from inorganic compounds in the environment without the use of sunlight. This process is called

High quality energy is constantly

Tropical rain forests may be prevented from returning to cleared areas if an irreversible ______________ is reached.

While the troposphere is 11 miles thick above sea level at the tropics, it is only four miles thick above the North and South poles.

The parts of the earth's air, water, and soil where life is found is called the

Complex networks of interconnected food chains are

The typical percentage of high quality energy loss in transfers from one trophic level to the next is about

Ozone gas in the lower part of the stratosphere filters out how much of the sun's harmful ultraviolet (UV) radiation?

Ecologists assign every type of organism in an ecosystem to a feeding level or ____________________.

Use the Figure above to answer the following question(s). -What group is indicated by letter E, to which all organisms in the pyramid eventually succumb?