Question 1

Which of the following lists of organisms is ranked in correct order from lowest to highest production efficiency?

Accepted Answer

A) bears,fish,mosquitos 
B) mosquitos,fish,bears 
C) fish,mosquitos,bears 
D) mosquitos,bears,fish 
E) bears,mosquitos,fish 
A) bears,fish,mosquitos 
B) mosquitos,fish,bears 
C) fish,mosquitos,bears 
D) mosquitos,bears,fish 
E) bears,mosquitos,fish

Question 2

What is the net ecosystem production of this square meter of tundra?

Accepted Answer

A) 100 g 
B) 85 g 
C) 15 g 
D) 1 g 
E) 0.15 g 
A) 100 g 
B) 85 g 
C) 15 g 
D) 1 g 
E) 0.15 g

Question 3

As big as it is,the ocean is nutrient-limited.If you wanted to investigate this,one reasonable approach would be to

Accepted Answer

A) follow whale migrations in order to determine where most nutrients are located. 
B) observe Southern/Antarctic Ocean productivity from year to year to see if it changes. 
C) enrich some areas of the ocean,and compare their productivity to that of untreated areas. 
D) compare nutrient concentrations between photosynthetic and non-photosynthetic zones. 
E) contrast nutrient uptake by autotrophs in marine locations with different temperatures. 
A) follow whale migrations in order to determine where most nutrients are located. 
B) observe Southern/Antarctic Ocean productivity from year to year to see if it changes. 
C) enrich some areas of the ocean,and compare their productivity to that of untreated areas. 
D) compare nutrient concentrations between photosynthetic and non-photosynthetic zones. 
E) contrast nutrient uptake by autotrophs in marine locations with different temperatures.

Question 4

Which statement most accurately describes how matter and energy are used in ecosystems?

Accepted Answer

A) Matter flows through ecosystems;energy cycles within a single ecosystem. 
B) Energy flows through ecosystems;matter cycles within and through ecosystems. 
C) Energy can be converted into matter;matter cannot be converted into energy. 
D) Matter can be converted into energy;energy cannot be converted into matter. 
E) Matter is used in every ecosystem;energy is only used in some ecosystems. 
A) Matter flows through ecosystems;energy cycles within a single ecosystem. 
B) Energy flows through ecosystems;matter cycles within and through ecosystems. 
C) Energy can be converted into matter;matter cannot be converted into energy. 
D) Matter can be converted into energy;energy cannot be converted into matter. 
E) Matter is used in every ecosystem;energy is only used in some ecosystems.

Question 5

You conduct an experiment to compare the nitrogen cycle in soils with and without non-native earthworms.Predict the results of your experiment.

Accepted Answer

A) The soils with earthworms will have a faster rate of nitrogen fixation. 
B) The soils with earthworms will have a faster rate of ammonification. 
C) The soils with earthworms will have a slower rate of denitrification. 
D) The soils with earthworms will have a slower rate of nitrification. 
A) The soils with earthworms will have a faster rate of nitrogen fixation. 
B) The soils with earthworms will have a faster rate of ammonification. 
C) The soils with earthworms will have a slower rate of denitrification. 
D) The soils with earthworms will have a slower rate of nitrification.

Question 6

A moderate-size lake in the American Midwest suddenly has succumbed to an algal bloom.What is the likely cause of eutrophication in this lake?

Accepted Answer

A) increased solar radiation during the summer season 
B) the introduction of non-native tertiary consumer fish 
C) excessive farm fertilizer runoff during a heavy rainfall 
D) accidental introduction of a prolific culture of algae 
E) iron dust blowing into the lake from area factories 
A) increased solar radiation during the summer season 
B) the introduction of non-native tertiary consumer fish 
C) excessive farm fertilizer runoff during a heavy rainfall 
D) accidental introduction of a prolific culture of algae 
E) iron dust blowing into the lake from area factories

Exam 42: Ecosystems and Energy

Which of the following lists of organisms is ranked in correct order from lowest to highest production efficiency?

What is the net ecosystem production of this square meter of tundra?

As big as it is,the ocean is nutrient-limited.If you wanted to investigate this,one reasonable approach would be to

Which statement most accurately describes how matter and energy are used in ecosystems?

You conduct an experiment to compare the nitrogen cycle in soils with and without non-native earthworms.Predict the results of your experiment.

A moderate-size lake in the American Midwest suddenly has succumbed to an algal bloom.What is the likely cause of eutrophication in this lake?

Introduction: Evolution and the Foundations of Biology

The Chemical Context of Life

Carbon and the Molecular Diversity of Life

A Tour of the Cell

Membrane Transport and Cell Signaling

An Introduction to Metabolism

Cellular Respiration and Fermentation

Photosynthesis

The Cell Cycle

Meiosis and Sexual Life Cycles

Mendel and the Gene Idea

The Chromosomal Basis of Inheritance

The Molecular Basis of Inheritance

Gene Expression: From Gene to Protein

Regulation of Gene Expression

Development,stem Cells,and Cancer

Viruses

Genomes and Their Evolution

Descent With Modification

Phylogeny

The Evolution of Populations

The Origin of Species

Broad Patterns of Evolution

Early Life and the Diversification of Prokaryotes

The Origin and Diversification of Eukaryotes

The Colonization of Land by Plants and Fungi

The Rise of Animal Diversity

Plant Structure and Growth

Resource Acquisition,nutrition,and Transport in Vascular Plants

Reproduction and Domestication of Flowering Plants

Plant Responses to Internal and External Signals

Homeostasis and Endocrine Signaling

Animal Nutrition

Circulation and Gas Exchange

The Immune System

Reproduction and Development

Neurons,synapses,and Signaling

Nervous and Sensory Systems

Motor Mechanisms and Behavior

Population Ecology and the Distribution of Organisms

Ecological Communities

Conservation Biology and Global Change

Filters