Which of the following is a gas molecule composed of three oxygen atoms? a. nitrogen oxide
c. sulfur dioxide
b. ozone
d. smog

Which element provides strength to the exoskeleton of clams and oysters

You are observing different types of cells in your science lab. one cell has many chloroplasts. what is the most likely function of this cell? a. energy production b. photosynthesis c. reproduction d. digestion

Which describes the habitat of a frog?