Question 1

Certain bacteria and fungi that are important in nutrient recycling because they release nutrients from dead organisms back into the ecosystem are:

Accepted Answer

A) autotrophs. 
B) carnivores. 
C) detritus feeders. 
D) decomposers. 
E) recyclers. 
A) autotrophs. 
B) carnivores. 
C) detritus feeders. 
D) decomposers. 
E) recyclers.

Question 2

The community of heterotrophic protists and invertebrate animals, such as earthworms, pillbugs, mites, and pseudoscorpions, that live in the leaf litter on the shady floor of a deciduous forest obtains its energy and nutrients primarily from:

Accepted Answer

A) carbohydrates formed in the roots of the trees that leach out into the surrounding soil. 
B) chemosynthesis by green and purple sulfur bacteria living on the surface of the leaves. 
C) decomposition of the leaves of deciduous trees that fall on the surface of the soil. 
D) photosynthesis or algae living in the soil beneath the leaves. 
E) predation on one another. 
A) carbohydrates formed in the roots of the trees that leach out into the surrounding soil. 
B) chemosynthesis by green and purple sulfur bacteria living on the surface of the leaves. 
C) decomposition of the leaves of deciduous trees that fall on the surface of the soil. 
D) photosynthesis or algae living in the soil beneath the leaves. 
E) predation on one another.

Question 3

Human-caused disturbances of the ________ cycle may be contributing to global warming.

Accepted Answer

A) hydrologic 
B) carbon 
C) nitrogen 
D) phosphorus 
E) sulfur 
A) hydrologic 
B) carbon 
C) nitrogen 
D) phosphorus 
E) sulfur

Question 4

What happens to 99% of the energy that reaches Earth's atmosphere?

Accepted Answer

A) It is captured by plants and used in photosynthesis. 
B) It is destroyed by the atmosphere. 
C) It is used as heat by animals. 
D) It is absorbed by rocks on Earth's crust. 
E) It is reflected or absorbed by the atmosphere, clouds, and Earth's surface. 
A) It is captured by plants and used in photosynthesis. 
B) It is destroyed by the atmosphere. 
C) It is used as heat by animals. 
D) It is absorbed by rocks on Earth's crust. 
E) It is reflected or absorbed by the atmosphere, clouds, and Earth's surface.

Exam 28: How Do Ecosystems Work

Certain bacteria and fungi that are important in nutrient recycling because they release nutrients from dead organisms back into the ecosystem are:

The community of heterotrophic protists and invertebrate animals, such as earthworms, pillbugs, mites, and pseudoscorpions, that live in the leaf litter on the shady floor of a deciduous forest obtains its energy and nutrients primarily from:

Human-caused disturbances of the ________ cycle may be contributing to global warming.

What happens to 99% of the energy that reaches Earth's atmosphere?

An Introduction to Life on Earth

Atoms, Molecules, and Life

Biological Molecules

Cell Structure and Function

Cell Membrane Structure and Function

Energy Flow in the Life of a Cell

Capturing Solar Energy: Photosynthesis

Harvesting Energy: Glycolysis and Cellular Respiration

The Continuity of Life: Cellular Reproduction

Patterns of Inheritance

Dna: the Molecule of Heredity

Gene Expression and Regulation

Biotechnology

Principles of Evolution

How Populations Evolve

The Origin of Species

The History of Life

Systematics: Seeking Order Amidst Diversity

The Diversity of Prokaryotes and Viruses

The Diversity of Protists

The Diversity of Plants

The Diversity of Fungi

Animal Diversity I: Invertebrates

Animal Diversity Ii: Vertebrates

Animal Behavior

Population Growth and Regulation

Community Interactions

Earths Diverse Ecosystems

Conserving Earths Biodiversity

Homeostasis and the Organization of the Animal Body

Circulation

Respiration

Nutrition and Digestion

The Urinary System

Defenses Against Disease

Chemical Control of the Animal Body: the Endocrine System

The Nervous System

The Senses

Action and Support: the Muscles and Skeleton

Animal Reproduction

Animal Development

Plant Anatomy and Nutrient Transport

Plant Reproduction and Development

Plant Responses to the Environment

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