How is stratospheric ozone created? Ozone is formed in when sulfur and nitrogen oxides combine with water in the atmosphere.

Ozone created from NOx and VOC gases rise from low altitudes into the stratosphere and form the ozone layer.

Radiant energy from the sun breaks apart oxygen molecules freeing single oxygen atoms that recombine into ozone.

When ultraviolet radiation passes through a depleted ozone layer it acts on oxygen at ground levels creating ozone.

well we can't tell you because we cant see the time give a screen shot or something.

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.

hey, i believe your answer would be d. sugar ribose and the base uracil. i believe this is the answer, because rna consists of sugar ribose, adenine, guanine, cytosine, and uracil.

your first option is incorrect, because that's dna. where it consists of sugar deoxyribose, adenine, guanine, cytosine and thymine.

your second option is also incorrect, this is because sugar deoxyribose is in dna, and uracil is in rna. these two do not make sense together.

your third option being incorrect, because sugar ribose is in rna, but not the base of thymine. rna consists of uracil, not thymine.

lastly your fourth option being correct! this answer is correct, because both sugar ribose, and the base uracil are in rna! ~

answer is d. sugar ribose and the base uracil.