The ultimate source of heat in the process of global warming is A) the burning of fossil fuels
B) carbon dioxide
C) the sun
D) greenhouse gases

It’s either C or D.

Which of the following matches the organisms described with the correct domain? a. archaea--multicellular, eukaryotic organisms that do not have cell walls b. eukarya--single-celled and multicellular organisms, with a defined nucleus and a variety of nutritional sources c. bacteria--unicellular, eukaryotic organisms with cell walls that do not contain peptidoglycan d. bacteria--unicellular, eukaryotic organisms that always lack cell walls

This is a membrane-bound, disk-shaped compartment inside chloroplasts and cyanobacteria. they are the site of the light-dependent reactions of photosynthesis.

Color blindness is a recessive sex linked human trait. if a color blind father and a mother with normal color vision have a color blind son what must be the mothers genotype? a. xn yn b. xn xn c. xn y d. xn xn