Question 1

Climax vegetation always consists of some type of trees.

Accepted Answer

A) True 
 B)False  False

Question 2

Events predicted to occur with increasing global temperatures include ________.

Accepted Answer

A)  sea level rising, resulting in flooding low-lying coastal areas 
B)  limited impact on human populations 
C)  no disruption of food producing acreage 
D)  decrease in global desert acreage 
E)  All of these answer choices are correct. 
A)  sea level rising, resulting in flooding low-lying coastal areas 
B)  limited impact on human populations 
C)  no disruption of food producing acreage 
D)  decrease in global desert acreage 
E)  All of these answer choices are correct. A

Question 3

More than 100 years ago Thomas Belt called attention to the symbiotic association between Acacia shrubs and ants. Acacia encouraged the association by providing food for the ants and a home in ________.

Accepted Answer

A)  long tendrils 
B)  rhizomes 
C)  small tubers 
D)  large hollow thorns 
E)  None of these answers are correct. 
A)  long tendrils 
B)  rhizomes 
C)  small tubers 
D)  large hollow thorns 
E)  None of these answers are correct. D

Question 4

Plants obtain their nitrogen supply directly from

Accepted Answer

A)  atmospheric nitrogen. 
B)  nitrates or ammonia. 
C)  proteins in the soil. 
D)  fertilizers. 
E)  soil bacteria. 
A)  atmospheric nitrogen. 
B)  nitrates or ammonia. 
C)  proteins in the soil. 
D)  fertilizers. 
E)  soil bacteria.

Question 5

Chemicals produced by higher plants that kill or inhibit disease fungi or bacteria are known as ________.

Accepted Answer

A)  allelopathic compounds 
B)  herbicides 
C)  immunotoxins 
D)  antibiotics 
E)  phytoalexins 
A)  allelopathic compounds 
B)  herbicides 
C)  immunotoxins 
D)  antibiotics 
E)  phytoalexins

Question 6

In an energy pyramid of an ecosystem ________.

Accepted Answer

A)  there is much more energy at the top than at the bottom. 
B)  there is little reduction in energy retained from one level to the next. 
C)  secondary consumers are sustained with less energy than primary consumers. 
D)  there is much more energy at the bottom than at the top. 
E)  the individual components do not function in a regulatory fashion. 
A)  there is much more energy at the top than at the bottom. 
B)  there is little reduction in energy retained from one level to the next. 
C)  secondary consumers are sustained with less energy than primary consumers. 
D)  there is much more energy at the bottom than at the top. 
E)  the individual components do not function in a regulatory fashion.

Question 7

Succession after a disturbance produces exactly the same plant communities as had existed before the disturbance.

Accepted Answer

A) True 
 B)False

Question 8

Trophic efficiency

Accepted Answer

A)  is the percentage of available energy actually transferred from one trophic level to the next. 
B)  is relatively high in aquatic ecosystems averaging about 10% from one tropic level to the next. 
C)  is lower in terrestrial ecosystems when compared with aquatic ecosystems. 
D)  tells us that secondary consumers get far less energy than if they were a primary consumer. 
E)  All of these are correct statements about trophic efficiency. 
A)  is the percentage of available energy actually transferred from one trophic level to the next. 
B)  is relatively high in aquatic ecosystems averaging about 10% from one tropic level to the next. 
C)  is lower in terrestrial ecosystems when compared with aquatic ecosystems. 
D)  tells us that secondary consumers get far less energy than if they were a primary consumer. 
E)  All of these are correct statements about trophic efficiency.

Question 9

Which of the following is an example of secondary succession?

Accepted Answer

A)  reforestation after a fire 
B)  successive development of vegetation on a lava flow after it has cooled 
C)  successive development of vegetation in a pond created by a beaver dam 
D)  successive development of vegetation on a rock pile after an avalanche 
E)  None of these answers are correct. 
A)  reforestation after a fire 
B)  successive development of vegetation on a lava flow after it has cooled 
C)  successive development of vegetation in a pond created by a beaver dam 
D)  successive development of vegetation on a rock pile after an avalanche 
E)  None of these answers are correct.

Question 10

Which of the following is the term used for bacteria that use nitrates instead of oxygen in their respiration?

Accepted Answer

A)  nitrifying 
B)  denitrifying 
C)  nitrogen-fixing 
D)  hardpan bacteria 
E)  None of these answers are correct. 
A)  nitrifying 
B)  denitrifying 
C)  nitrogen-fixing 
D)  hardpan bacteria 
E)  None of these answers are correct.

Question 11

A ________ is a group of individuals of the same species, occupying the same region and potentially interacting with each other.

Accepted Answer

A)  community 
B)  ecosystem 
C)  population 
D)  food chain 
E)  family group 
A)  community 
B)  ecosystem 
C)  population 
D)  food chain 
E)  family group

Question 12

Kudzu, tamarisk, and the agents that cause Dutch Elm disease and American Chestnut blight are examples of how introduction of foreign species can disrupt natural ecosystems.

Accepted Answer

A) True 
 B)False

Question 13

A producer is an organism that carries on photosynthesis.

Accepted Answer

A) True 
 B)False

Question 14

Hydrophyte plants require running water for pollination.

Accepted Answer

A) True 
 B)False

Question 15

Features of plants and animals that allow them to survive and reproduce in their environment are considered ________. One example of this is CAM photosynthesis in desert plants.

Accepted Answer

A)  advantages 
B)  allocations 
C)  modifications 
D)  mutations 
E)  adaptations 
A)  advantages 
B)  allocations 
C)  modifications 
D)  mutations 
E)  adaptations

Question 16

Humans have little impact on water, carbon, and nitrogen cycles in the biosphere.

Accepted Answer

A) True 
 B)False

Question 17

Energy is normally completely recycled in an ecosystem.

Accepted Answer

A) True 
 B)False

Question 18

The foremost decomposers in ecosystems are the roots of plants.

Accepted Answer

A) True 
 B)False

Question 19

Components of the abiotic environment include ________.

Accepted Answer

A)  predators 
B)  pollinating species 
C)  all living species 
D)  seasonal temperatures 
E)  All of these answer choices are correct. 
A)  predators 
B)  pollinating species 
C)  all living species 
D)  seasonal temperatures 
E)  All of these answer choices are correct.

Question 20

The total mass of consumers is largely determined by the total mass of food made available by the producers.

Accepted Answer

A) True 
 B)False

Exam 25: Ecology

Climax vegetation always consists of some type of trees.

Events predicted to occur with increasing global temperatures include ________.

More than 100 years ago Thomas Belt called attention to the symbiotic association between Acacia shrubs and ants. Acacia encouraged the association by providing food for the ants and a home in ________.

Plants obtain their nitrogen supply directly from

Chemicals produced by higher plants that kill or inhibit disease fungi or bacteria are known as ________.

In an energy pyramid of an ecosystem ________.

Succession after a disturbance produces exactly the same plant communities as had existed before the disturbance.

Trophic efficiency

Which of the following is an example of secondary succession?

Which of the following is the term used for bacteria that use nitrates instead of oxygen in their respiration?

A ________ is a group of individuals of the same species, occupying the same region and potentially interacting with each other.

Kudzu, tamarisk, and the agents that cause Dutch Elm disease and American Chestnut blight are examples of how introduction of foreign species can disrupt natural ecosystems.

A producer is an organism that carries on photosynthesis.

Hydrophyte plants require running water for pollination.

Features of plants and animals that allow them to survive and reproduce in their environment are considered ________. One example of this is CAM photosynthesis in desert plants.

Humans have little impact on water, carbon, and nitrogen cycles in the biosphere.

Energy is normally completely recycled in an ecosystem.

The foremost decomposers in ecosystems are the roots of plants.

Components of the abiotic environment include ________.

The total mass of consumers is largely determined by the total mass of food made available by the producers.

What Is Plant Biology

The Nature of Life

Cells

Tissues

Roots and Soils

Stems

Leaves

Flowers, Fruits, and Seeds

Water in Plants

Plant Metabolism

Growth

Meiosis and Alternation of Generation

Genetics

Plant Breeding and Propagation

Evolution

Plant Names and Classification

Domain Kingdom Bacteria, Domain Kingdom Archaea, and Viruses

Kingdom Protista

Kingdom Fungi

Introduction to the Plant Kingdom: Bryophytes

The Seedless Vascular Plants - Ferns and Their Relatives

Introduction to Seed Plants: Gymnosperms

Seed Plants: Angiosperms

Flowering Plants and Civilization

Biomes

Filters