What are the two main source of energy on earth that can drive ecosystems

Which incident would result in primary succession instead of secondary succession?

How many variables are altered in a good experiment? a.1 b.0 c.2 d.3

Consider an organism that is eukaryotic, found in both unicellular and multicellular forms, may resemble a plant but is not photosynthetic, has chitin in its cell walls, and absorbs organic nutrients from decomposing material in the environment. this organism would be classified as which of the following types of organisms? a. fungib. protozoac. bacteriad. archaea