Which of these best describes a hormone? O A. A chemical message with a specific target
O B. An enzyme delivered to a specific gland
O C. Any message carried by the bloodstream
D. A steroid carrying a message to a receptor cell

What is true of all organisms in the kingdoms protista, plantae, fungi, and animalia? a. they are multi-celled. b. they are photosynthetic. c. they have cells that contain membrane-bound organelles. d. they contain cells that lack membrane-bound organelles.

Which coal field location is related to coal fields in the eastern united states and supports the theory of continental drift? eastern india southern africa western australia northern south america

The direct energy source that drives atp synthesis during respiratory oxidative phosphorylation is