I really need help on these 2 questions since I don’t really know much :

An easy way to calculate the amount of energy available at each level is to what?

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi

Select all that apply. why are common names not a good reference to a species? common names can be in different languages common names vary with location common names vary with culture common names vary with species color