Which examples represent abiotic factors affecting biotic factors? Check all that apply.Sediment builds up in a riverbed, slowing the river’s speed.Ash from a volcanic eruption kills new plant growth.A hungry raccoon consumes a freshwater clam.Warm water from a nuclear power plant causes overgrowth of algae.A river floods and deposits tree pollen along its banks.
Answer
A
Sediment builds up in a riverbed, slowing the river’s speed.
B
Ash from a volcanic eruption kills new plant growth.
C
A hungry raccoon consumes a freshwater clam.
D
Warm water from a nuclear power plant causes overgrowth of algae.
E
A river floods and deposits tree pollen along its banks.
Explanation
An abiotic factor is nonliving, while a biotic factor is living or comes from living things. Volcanic ash kills new plants (B), and warm water causes algae to grow (D), so a nonliving factor affects living organisms in both cases. A flood is also nonliving and carries tree pollen from plants along the banks (E). Sediment changing the river’s speed affects another nonliving factor, and the raccoon eating the clam is a biotic factor affecting another biotic factor.
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