Which compound of earth's atmosphere is decreased due to photosynthesis
a. ozone
b. oxygen
c. hydrogen peroxide
d. carbon dioxide

Using meiosis, the sporophyte produces spores that are .

Which factor that affects biodiversity?

The offspring of a black cat and a white cat is a gray cat, it has the genotype bw if a black cat mates with a gray cat the chance that the offspring is white will be what percent?