Chlorofluorocarbon molecules are environmentally significant because a. their chlorine atoms can destroy many stratospheric ozone molecules.
b. they are poisonous, flammable, and corrosive to metals.
c. their absorption of lethal solar energy protects Earth.
d. they readily break down ozone molecules produced as pollution

What came first egg or chicken? and is tomato a vegetable or a fruit?

Astudent wants to test the hypothesis that fertilizer improves the growth rate of grass seeds. to test this hypothesis, the student put the same amount of grass seed in 3 containers with the same type of soil. the student measured the growth at the end of the week. all plants received equal amounts of water and sunlight. if you were asked to graph this data, what would you place on the x-axis? a. fertilizer b. water c. plant growth d. week one

Identify the structures ! 20 points