0. How might the channelization of rivers affect populations in river ecosystems? A. Aquatic species might find new food sources.
B. Aquatic species might require different nutrients.
C. Aquatic species might adapt to land environments.
D. Aquatic species might lose the conditions they need to survive.

Which codon is the code for the amino acid histidine (his)?

Molecular models of two different substances are shown below. in the molecule on the left, the oxygen atom pulls on electrons more strongly than the hydrogen atoms. in the molecule on the right, the two oxygen atoms pull on the shared electrons with the same strength. water molecule, h, o oxygen molecule, oz when the two substances are put in the same container, they do not attract each other. why does this happen? a. they both contain oxygen. b. one is polar and one is nonpolar. c . they are both polar. d. they contain different elements.

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?