3. Organic molecules containing carboxyl groups are a. nonpolar.
c. basic.
b. acidic.
d. None of the above are correct

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.

What are antigens and antibodies? how are they involved in the body’s response to incompatible blood?

Scientists discovered fossils in several layers of the earth you see here. they found fossils of algae, snails, and clams in layer d. given that information, where do you think they found fossil evidence of simple land plants and amphibians? a. a b. e c. f d. g