Which best describes the ecosystems on Earth? A. Earth has mostly rain forest ecosystems.
B. Separate ecosystems can affect each other.
C. There are very few types of ecosystems on Earth.
D. Ecosystems do not interact with each other.

Food provides molecules that serve as fuel and building material for all organisms. plants undergo photosynthesis and make their own food. other organisms, like us and the horse seen above, are consumers and eat food. how do all organisms use food as fuel? be sure to include the name of the process in your answer. me.

What makes a dominant allele different from a recessive allele

Which of the following is an abiotic factor in an ecosystem? a. bacteriab. airc. niched. grass(abiotic=non-living) me !