Unit 2 CANVAS APES

Put these in order of evolutionary emergence: 1. the first photosynthesizing cells appear 2. cells with no distinct nucleus formed underwater and away from the harmful UV radiation of the sun 3. collections of proteins and/or RNA joined together to form membrane-bound vesicles that could grow and divide 4. first sexually reproducing cells arrive, creating opportunities for greater diversity.

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The phosphate-rich manure of fish-eating birds is known as:

• Guano

• Ammonia

• Sediments

• Fossil fuel

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An omnivore is best described as:

• a consumer of both producers and consumer

• an autotroph

• a consumer of other consumers

• a producer

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The surface down-slope movement of water is known as:

• Runoff

• Percolation

• Condensation

• Solifluction

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Ocean current flow affects:

• All of these are correct

• climate

• weather

• up- and downwelling

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Unlike in the _________ biome, most flora store nutrients in their roots; in the __________ biome, most of the nutrients are stored in their biomass.

More than 97% of the hydrosphere is:

• salt water

• freshwater and saltwater combined

• aquifers

• groundwater

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A process of species adaptation driven by beneficial gene mutations is called:

• natural selection

• coevolution

• extinction

• convergent evolution

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An excessive amount of nitrate in a lake due to agricultural runoff can:

• Stimulate rapid growth of algae and lead to eutrophication.

• Stimulate rapid growth of algae and lead to an increase in the fish population.

• Prevent algae growth and lead to eutrophication.

• Prevent algae growth and eutrophication.

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While salinity is the main determining factor, biome delineation--often serving as an invisible line of demarcation.

• temperature and light

• dissolved carbon dioxide levels

• complex food webs

• pollution levels

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