Biogeochemical cycles on earth serve a variety of different purposes. what do the biogeochemical cycles have in common? a. they all serve the same function in sustaining life on earth. b. they all include only nonliving components of an ecosystem. c. they are all essential for sustaining life on earth. d. they all include only living components of an ecosystem.

Which of the following statements about c4 carbon fixation is not true? a c4 carbon fixation is an adaptation for plants exposed to high light intensityb. c4 carbon fixation occurs in more plants than c3 carbon fixation.c c4 carbon fixation is more common in areas of high temperatures than c3 carbon fixation.d. c4 carbon fixation occurs in the inner cells of a leaf rather than the entire leaf.

If you have a difficult time knowing where your hand is without looking at it you may be having a problem with your what ?

The pelican's beak is adapted for in .