Which of the following is a possible consequence of ozone layer depletion on living organisms?
a.
increased exposure to ground-level ozone
b.
decreased levels of ultraviolet radiation in the troposphere
c.
increased levels of ultraviolet radiation absorption in the stratosphere
d.
none of the above

the right answer is a. skin cells forming from sunlight.

the liver is an organ endowed with a fantastic ability to regenerate

. thus, if a hepatectomy (ablation) of 70% of the hepatic mass is performed in the rat, there is complete recovery in 7 to 10 days.

prokaryotes are beings that have existed since the existence of life on earth, and do not come from another realm.

ribosomes are organelles that exist naturally in eukaryotes, either in free form or attached to the endoplasmic reticulum.

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