Any environmental resource that, because it is scarce or at unfavorable levels, restricts the ecological niche of an organism is called

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm

Write the balanced chemical equation forphotosynthesis.

50 points! which of the following is an inference? a burning candle is extinguished when it is covered with a jar. the candle burns longer than expected in a jar that has a plant in it. a plant lives longer than expected in a jar that has a burning candle. there is more oxygen in the jar because there is a plant in it.