Ecology Unit Review Chap 33

Chapter 33 Review Sheet
Defintions:
Identify the key terms from chapter 33 (these may or may not be in bold) . Organize terms by section. During the rest of this review sheet attempt to use these terms to answer the questions. DO NOT just write the terms and define them

General Questions
What does the discipline of ecology study?
What are the different models of ecological succession. Give an example where each may be used.
What factors influence population growth
Using survivorship curves explain reproductive strategies for each type of population.
What is a life history pattern? What types are there. Give an example of each type.
Identify density dependent and density independent factors. Have an example for each.
How can competition effect population size and location?
What are types of antipredator defenses?
Compare the types of mimicry why does each type work?
symbiosis?
Drawings:
Levels of organization
Secondary Succession
Patterns of population growth
Survivorship curve
Human population growth
Age structure Diagrams
Vertical resource partitioning
Direct Competition
Keystone species
Predator prey interaction

Multiple choice Practice
1. Ecology is best defined as the study of

A. populations.

B. the rate of population changes.

C. population increases and decreases.

D. how populations are restricted by environmental resistance.

E. organisms as they interact with other organisms and with their physical surroundings.

3. Your front yard represents a(n) _______ while the leafhoppers represent a(n) ______.

A. population; community

B. population; ecosystem

C. ecosystem; population

D. community; population

E. ecosystem; community
5. The study of the interrelationships of plants and animals with each other and with their environment is known as

A. a trophic level.

B. a food web.

C. a habitat.

D. a biosphere.

E. ecology.
9. The composition of a community refers to the

A. nutrients available in the soil.

B. sunlight available to drive the energy needed for metabolism.

C. types of species adapted to living there.

D. type of succession that occurs locally.

E. extent vegetation covers the ground--a desert has low composition.
12. The theory that plants cannot grow on a particular area until the soil has been developed enough is the

A. climax-pattern model.

B. facilitation model.

C. inhibition model.

D. tolerance model.

E. soil development model.
16. The maximum rate of natural increase of a population that can occur under ideal conditions is the

A. population growth.

B. biotic potential.

C. environmental resistance.

D. carrying capacity.

E. steady state.
19. Biotic potential depends on all of the following EXCEPT

A. the usual number of offspring per reproduction.

B. how often each individual reproduces.

C. how many different mates each individual has.

D. chances of survival until the age of reproduction.

E. the age at which reproduction begins.
23. The human growth curve is best described as being

A. flat.

B. J-shaped.

C. V-shaped.

D. S-shaped.

E. W-shaped.
27. Which of the following describes a type II survivorship curve (drawn by plotting the number of individuals in a given population alive at the beginning of each age interval)?

A. Most individuals die of old age.

B. Many individuals die early in life.

C. Individuals die at a constant rate throughout time.

D. Most individuals die during their reproductive years.
33. If the growth rate increases, the doubling time

A. increases.

B. decreases.

C. remains the same.

D. depends on the amount of natural resources.

37. Which of the following statements is NOT true?

A. The growth rate for MDCs has now stabilized.

B. The growth rate for LDCs has now stabilized.

C. The LDCs are not fully industrialized.

D. People in LDCs are often underfed and live in poverty.

E. Currently, over two-thirds of the human population live in LDCs.
53. In an Asian rice paddy, carp eat decaying material from around the base of rice plants while a snail scrapes algae from the leaves, stems, and roots of the same plant. They can survive at the same time in the same rice paddy because they occupy

A. the same habitat but different niches.

B. the same habitat and the same niche.

C. the same niche but different habitats.

D. different habitats and different niches.
59. In large natural ecosystems, competition between two species over time will usually result in

A. death of all the members of one species within a short time.

B. equal numbers of each species persisting for a long time.

C. each species occupying a slightly different niche.

D. hybridization between the two species, resulting in a third species.

E. None of the choices are correct.
65. Overall, the most scientifically correct viewpoint toward predators is

A. predators help keep prey populations from overexploiting limited food resources.

B. generally, ecosystems support more and healthier populations when the large carnivores were eliminated from the system.

C. there is a high level of cruelty and indiscriminate killing among larger predators.

D. when we eliminate predators that could harm us and our activities, we also improve conditions for other animal populations.

E. predators are a neutral influence on prey populations and our activities merely substitute us for the prey we eliminate.
71. An intimate relationship between two species in which coevolution and adaptation occur is

A. competition.

B. a community.

C. an ecosystem.

D. predation.

E. symbiosis.
87. Which of the following IS NOT a form of environmental resistance?

A. Limited food supply

B. Accumulation of waste products

C. Number of offspring produced per litter

D. Predation
74. Which is NOT a parasitic relationship?

A. The Dutch elm disease fungus infects and kills elm trees.

B. The yellow fever virus causes fever and sometimes kills humans.

C. A female tick fastens to the skin of a human host and draws blood for nutrition to make her eggs.

D. The trichina worm burrows into muscle tissue, forms a cyst, and waits to continue its cycle until a predator consumes the host.

E. Unsightly dandelions sprout in a yard and compete with the fescue grass for sunlight.