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

What refers to the conversion of water from liquid to vapor from the earth's oceans,lakes,rivers,and soil?

Organisms that cannot produce their own food and,therefore,must eat other organisms,are called ____________________.

Which of the following is a major violator of the chemical cycling principle?

The use of transmitters and GPS systems are very important in the study of ____.

What is a primary link between photosynthesis and aerobic respiration?

All physical forms of water (solid,liquid,and gas)on or near the earth's surface make up the ____.

Although tropical rain forests are only about 2% of the earth's land surface,they contain about 50% of the world's land plant and animal species.

Fossil fuels and minerals are found in the ____.

Organisms that feed only on plants are called ____.

Thanks to concentrated efforts,nearly half of the waste produced by humans is now recycled.

A group of individuals of the same species living in the same place at the same time is a(n)____________________.

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

Which statement about microorganisms is true?

Ecological tipping points related to the earth's major natural systems are also called

Nitrogen gas,the major component of the atmosphere,cannot directly be used by plants and animals.

The three major processes in the water cycle are ____________________,____________________,and ____________________.

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

The rotten-egg smell coming from volcanoes and anaerobic decomposition in bogs and swamps comes from the gas ____________________.

Consider the concept of trophic levels,and explain why it may be necessary for humans to eat less meat.How much energy is lost from one level to the next? Use numbers to support your argument.

Each trophic level in a food chain or food web contains a certain amount of organic matter,called ____.