1-
the earth's troposphere is known for being he layer of the atmosphere
select one:
a. that is the highest in elevation above the earth's surface
b. where meteors burn up on their descent
c. that is closest to the earth's surface and contains the weather
d. that contains the ozone layer

as a result of the experiments of lavoisier, you know that in a chemical reaction the mass of the products
select one:
a. cannot be predicted based on the mass of the reactants
b. s less than the mass of the reactants
c. is twice as great as the mass of the reactants
d. always equals the mass of the reactants

this is the site of cellular respiration in all eukaryotes.
select one:
a. lysosomes
b. ribosomes
c. chloroplasts
d. mitochondria