Halobacterium has a photosynthetic membrane that appears purple. its photosynthetic action spectrum is the inverse of the action spectrum for green plants. (that is, the halobacterium action spectrum has a peak where the green plant action spectrum has a trough.) what wavelengths of light do the halobacterium photosynthetic pigments absorb?

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.

Which of the following best describes the relationship between glucose and complex molecules such as hormones?

Categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. makes predictions