2. Chlorine free radicals are produced in the upper atmosphere when ultraviolet radiation interacts

with chlorofluorocarbons (CFCs). The free radicals catalyze the conversion of ozone to oxygen. How is

this catalysis harmful to humans?

i think it is d. e because the next one is igneous.

d. temperate deciduous forest

the answer is the first option

explanation:

just googled it m8. not that hard

lol

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?