Which of the following decreased carbon dioxide levels in the atmosphere?

A. Cellular respiration

B. Decomposition by bacteria

C. Burning fossil fuels

D. Photosynthesis

one definition of a problem drinker is one who must drink to functionwith life. How does the navy define "alcoholism:.

What is the relationship between the Kuiper Belt and the status of Pluto today? A. The Kuiper Belt is at a much greater distance from the sun than is Mars. B. The Kuiper Belt is home to a dwarf planet similar to Pluto. C.

Which statement is true about two atoms of carbon that have the same number of neutrons? A. They are the same isotope. B. They have a different number of protons. C. They have different number of neutrons. D. Their atomic numbers are different.

Which of the following is NOT a characteristic of the cortical nephrons? a. Their nephron loop is closely wrapped with vasa recta. b. Cortical nephrons form the majority of nephrons in the kidney. c.

1. Which of the following compete for space on intertidal rocks? A. Algae, Mussels, and Whelk B. Algae and Mussels C. Whelk and Chiton D. Starfish only

Considering the carbon cycle, which of the choices would result if a large area of forest were burned?

What is the term used to describe relatively small areas with unusually high concentrations of species found there and nowhere else, including many species in high risk of extinction? These areas receive the focus of global conservation efforts.

Explain four unique properties create an environment hospitable to life

How do crickets obtain energy.?

Which type of stars is very hot but gives off little light? dwarfs giants main sequence stars nebula