Question 1

Climax vegetation always consists of some type of trees.

Accepted Answer

A) True 
 B)False  False

Question 2

_________________ and _________________ are the two common gases that lessen re-radiation of heat back into the space and, hence, contribute to increasing temperatures on Earth.

Accepted Answer

A)  CFCs (chloroflorocarbons); halons 
B)  carbon dioxide; methane 
C)  sulfur dioxide; nitric acid 
D)  nitrogen gas (N2); ammonia 
E)  water vapor; nitrogen gas (N2) 
A)  CFCs (chloroflorocarbons); halons 
B)  carbon dioxide; methane 
C)  sulfur dioxide; nitric acid 
D)  nitrogen gas (N2); ammonia 
E)  water vapor; nitrogen gas (N2) B

Question 3

Fires benefit both grassland and forest vegetation by converting dead organic materials to nutrient-rich ash.

Accepted Answer

A) True 
 B)False  True

Question 4

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 5

When a grass plant is eaten by an herbivore, which in turn is eaten by a carnivore, this is an example of a

Accepted Answer

A)  symbiosis. 
B)  autotrophic web. 
C)  food chain. 
D)  trophic level. 
E)  ecotype. 
A)  symbiosis. 
B)  autotrophic web. 
C)  food chain. 
D)  trophic level. 
E)  ecotype.

Question 6

The __________ or living component of any environment includes all individuals of each species that interact in that habitat.

Accepted Answer

A)  biotic 
B)  abiotic 
C)  population 
D)  ecosystem 
E)  ecotype 
A)  biotic 
B)  abiotic 
C)  population 
D)  ecosystem 
E)  ecotype

Question 7

Loss of nitrogen from the soil occurs as a result of which of the following?

Accepted Answer

A)  erosion 
B)  leaching by water 
C)  harvesting 
D)  fire 
E)  all of these answers are correct 
A)  erosion 
B)  leaching by water 
C)  harvesting 
D)  fire 
E)  all of these answers are correct

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

As much as 90% or more of the carbon dioxide needed throughout the earth for photosynthesis is produced by

Accepted Answer

A)  animals. 
B)  broad-leaved vegetation. 
C)  aquatic algae. 
D)  decay bacteria and fungi. 
E)  coniferous forests. 
A)  animals. 
B)  broad-leaved vegetation. 
C)  aquatic algae. 
D)  decay bacteria and fungi. 
E)  coniferous forests.

Question 10

The majority of chaparral species, both woody and herbaceous, are so adapted to fire that their seeds will not germinate, as a rule, until fires remove accumulated litter.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following estimates or calculations are made with respect to populations?

Accepted Answer

A)  numbers of individuals 
B)  density 
C)  biomass 
D)  geographical range 
E)  all of these answers are correct 
A)  numbers of individuals 
B)  density 
C)  biomass 
D)  geographical range 
E)  all of these answers are correct

Question 12

Primary succession usually takes place in areas previously covered with vegetation.

Accepted Answer

A) True 
 B)False

Question 13

Phenology refers to the timing of developmental events, such as germination, flowering and seed production, in the life cycle of a plant.

Accepted Answer

A) True 
 B)False

Question 14

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

Accepted Answer

A) True 
 B)False

Question 15

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 16

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

Question 17

A producer is an organism that carries on photosynthesis.

Accepted Answer

A) True 
 B)False

Question 18

Energy is normally completely recycled in an ecosystem.

Accepted Answer

A) True 
 B)False

Question 19

Carbon dioxide comprises approximately what percentage of the atmosphere?

Accepted Answer

A)  13.38% 
B)  3.8% 
C)  0.38% 
D)  0.038% 
E)  0.138% 
A)  13.38% 
B)  3.8% 
C)  0.38% 
D)  0.038% 
E)  0.138%

Question 20

Weedy plant species are ______________________.

Accepted Answer

A)  usually large, long-lived plants that occur in stable habitats 
B)  usually fast growing, small annuals that reproduce quickly 
C)  usually woody 
D)  usually herbaceous perennials 
E)  plants that usually require two growing seasons to complete their life cycle 
A)  usually large, long-lived plants that occur in stable habitats 
B)  usually fast growing, small annuals that reproduce quickly 
C)  usually woody 
D)  usually herbaceous perennials 
E)  plants that usually require two growing seasons to complete their life cycle

Exam 25: Ecology

Climax vegetation always consists of some type of trees.

_________________ and _________________ are the two common gases that lessen re-radiation of heat back into the space and, hence, contribute to increasing temperatures on Earth.

Fires benefit both grassland and forest vegetation by converting dead organic materials to nutrient-rich ash.

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

When a grass plant is eaten by an herbivore, which in turn is eaten by a carnivore, this is an example of a

The __________ or living component of any environment includes all individuals of each species that interact in that habitat.

Loss of nitrogen from the soil occurs as a result of which of the following?

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

As much as 90% or more of the carbon dioxide needed throughout the earth for photosynthesis is produced by

The majority of chaparral species, both woody and herbaceous, are so adapted to fire that their seeds will not germinate, as a rule, until fires remove accumulated litter.

Which of the following estimates or calculations are made with respect to populations?

Primary succession usually takes place in areas previously covered with vegetation.

Phenology refers to the timing of developmental events, such as germination, flowering and seed production, in the life cycle of a plant.

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

Plants obtain their nitrogen supply directly from

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 ______________________________.

A producer is an organism that carries on photosynthesis.

Energy is normally completely recycled in an ecosystem.

Carbon dioxide comprises approximately what percentage of the atmosphere?

Weedy plant species are ______________________.

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 Kingdombacteria, Domain King-Domarchaea, 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

_ and _ are the two common gases that lessen re-radiation of heat back into the space and, hence, contribute to increasing temperatures on Earth.