BIOL 1001 Chapter 45: Chapter 45.docx

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greybutterfly803

9 Apr 2012

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Ecology can be divided into four levels of organization: Organismal ecology- researchers study organism to determine genetic, biochemical, and behavioural adaptations to abiotic environment. Population ecology- researchers focus on groups of individuals that live together; how size and other characteristics change in space and time. Community ecology- examines populations of different species that live together in one area (are sympatric). Analyzes how predation, competition and ecological disturbances influence a community. Ecosystem ecology- explores how nutrient cycle and energy flows between an ecological community and abiotic environment. Seven characteristics can be described for any population: geographic range- the overall spatial boundaries within which a population lives. Every population also occupies a habitat, the specific environment in which it lives, characterized by its biotic and abiotic factors. It can vary in its magnitude for different populations: population size and density- species with a larger body size generally have a lower population density.

Related Questions

Community Ecology

6. Competition between species is called ____________ competition. A. interspecific
B. exploitative
C. interference

D. fundamental E. intraspecific

7. A species that plays a critical role in maintaining the structure of an ecological community and helps to determine the types and numbers of various other species in the community is known as
A. a predator.

B. a keystone species. C. the primary species. D. the dominant species. E. the alpha species.

Evolution

1. We build trees because:
A. Organisms are related like members of a family are related.
B. Each lineage has a common ancestor that gave rise to that lineage. C. Characteristics are passed on from parents to offspring.
D. all of the above

2. Evolution basically denotes change in populations to: A. Improve reproductive success.
B. Remove defective individuals.
C. Increase the survival of the most fit individuals.

D. Discover better genes.

3. We can put species into groups based on shared: A. genes.
B. characteristics.
C. ecology.

D. environment.

4. Bats and birds share a common characteristic like having four limbs- homologies- with: A. Amphibians
B. Rodents.
C. Reptiles.

D. all of the above.

5. Which of these are mechanisms of evolution? A. Mutation
B. Migration
C. Gene flow

D. all of the above

6. Natural selection involves the following: A. Variation in traits
B. Differential reproduction
C. Hereditary

D. all of the above

provide some examples of both plant and animal adoptions to theenvironment?

Identify characteristics that make a population unique. Analyzepatterns of population growth. Explain the importance of lifehistory in relation to populations.

Explain how ecosystems influence species and their evolution.Identify characteristics within a species that affects the speciesrichness in a community. Analyze factors that influence thestructure of a community.

taupedeer119

The american bald eagle was on the endangered species list for many years, the birds number have rebounded considerably. Study of these birds occurs at what level?

ecosystem ecology

population ecology

community ecology

biosphere ecology

sapphirekangaroo316

BIOL 1001 Chapter 45: Chapter 45.docx

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