81. what element has the electron configuration 1s²2s²2pº3s 3p? ?
a. nitrogen
c. silicon
b. selenium
d. silver

Which is true concerning the products and reactants of photosynthesis and cellular respiration? a. the products of photosynthesis are sugars and the reactants of cellular respiration are starches. b. the products of photosynthesis are reactants in cellular respiration. c. oxygen is needed for photosynthesis and is given off in cellular respiration.

If c + di is a point on the circle, then | c + di |=

When microscope slides are stained to show blood cells, the small red blood cells that appear on the slides are much numerous than the large white blood cells. this supports the concept that