Two species of flies, Drosophila melanogaster and Drosophila simulans, can mate. They usually do not mate, however, even if
they are kept together in a laboratory. Males court the females of both species, but the females prefer to mate with males of
their own species. Which isolating mechanism does this describe?
O behavioral
O temporal
O artificial
O anatomical

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.

Ecosystems involve living organisms interacting with non-living things in a productive way; how is photosynthesis an example of this? answer, i will give brainiest to first person to get it right.

Which statement correctly describes other ways in which nebulae and stars are different? a. a star always has a higher density than a nebula. b. stars can form inside a nebula but a nebula can never be produced by any star. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star. reset submit