W4 Benchmark I Review Questions
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Most scientists classify organisms into
Six kingdoms
Most land animals depend on angiosperms for
Food
What factors describes soil and temperature in an ecosystem?
Abiotic Factors
What best describes a population?
Members of the same species, living in the same place, at the same time.
Single-celled organisms with cell walls but no nuclei are
Bacteria
Which gas makes up 78 percent of our atmosphere but can be used by plants only?
Nitrogen
What kind of natural disaster helps some forest communities by allowing some trees to release their seeds, by clearing away deadwood, and by encouraging new growth?
Fire
What are examples of photosynthetic organisms?
Freshwater algae
Plants play a crucial role in the carbon cycle because they…
Allow carbon to enter an ecosystem through photosynthesis.
What is an example of secondary succession?
Growth of plants after a forest is destroyed by fire.