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biodiversity Flashcards

(5 cards)

1
Q

outline the roles of microorganisms in the nitrogen cycle

A

-nitrogen fixing bacteria - converts gaseous nitrogen into ammonia
-nitrifying bacteria - convert ammonium compounds into nitrates. nitrobacter then converts nitrites into nitrates

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2
Q

outline role of organisms in the carbon cycle

A

-respiration of plants and animals add carbon dioxide into the atmosphere
-photosynthesis of plants removes carbon dioxide from the atmosphere
-decomposers decay plant and animal material into carbon dioxide

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3
Q

what is sampling

A

selecting a group of individuals that will represent the whole target population. allows us to measure the distribution and abundance of organisms

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4
Q

factors that limit the max size of a population

A

-food
-water
-light
-oxygen
-predators

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5
Q

give reasons why we conserve and preserve habitats

A

economic - food source, natural pest control, boosts tourism
social-many organisms can be used in medicine, aesthetics
ethical- we have a responsibility to maintain habitats for future generations

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