Biogeography

The nitrogen found in the atmosphere is not in a form that plants or animals can use.  What converts it into a usable form?

• Bacteria

• Photosynthesis

• Decomposition of organisms

• Fungi

What role do decomposers play in the nitrogen cycle?

• They fix atmospheric nitrogen into the soil.

• They release nitrogen back into the atmosphere.

• They break down organic matter, returning nitrogen to the soil.

• They convert nitrogen into a form usable by plants.

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Which process is primarily responsible for the release of oxygen into the atmosphere?

• Cellular respiration

• Photosynthesis

• Decomposition

• Nitrogen fixation

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How do plants contribute to the carbon cycle?

• By absorbing carbon dioxide during photosynthesis

• By releasing carbon dioxide during photosynthesis

• By converting carbon dioxide into nitrogen

• By storing carbon dioxide in their roots

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What prediction is correct about island biogeography?

• Smaller islands have more resources, and will have more biodiversity

• Larger islands have more space for resources, but will have less biodiversity due to competition

• Animals Islands closer to mainland will migrate successfully and there will be more diversity

• Animals will fly to far away mainland and there will be more diversity

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Which is NOT a factor in the theory of island biogeography?

• Islands farther from the continent have more species due to increased speciation

• dispersing species are more likely to find a large habitat

• islands can also be isolated areas within a continent

• larger habitats contain a larger range of environmental conditions

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the process by which a new community replaces another community that has been partially ot totally destroyed 

• exponential growth

• primary succession

• secondary succession 

• succesion 

__________ growth shows growth of a population under environmental constraints (carrying capacity-K) that sets a maximum population size 

• logistic

• exponential

• niche

• uniform

What type of symbiosis?  Hummingbirds feed on nectar from flowers.  The flowers are pollinated by hummingbirds as they move from flower to flower.

• commensalism

• mutualism

• parasitism

• predation

What is ecological succession?

• A series of predictable changes that occur in a community over time.

• It is the number of fish increasing.

• It is the seasons of the year.

• It is that rain follows cloud formation.