Free-living flatworms have pairs of sensory organs in their heads. What might make two sense organs set on either side of the head more adaptive than a single central organ?

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.

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry

Which of these reproductive method is the only on available to mosses and fernsspores