Which factor was most responsible for the production of oxygen by the elodea? a the presence of light stimulated photosynthesis. b the plant contained a large number of mitochondria.

Select all the true statements about the cosmic microwave background radiation

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.

Which describes a grizzly bear’s habitat?