Scientists think that oxygen produced by the first photosynthetic bacteria contributed to the creation of the ozone layer we have today. If the ozone layer blocked visible instead of UV radiant energy, what do you think would have happened to life on early Earth?

Life on Earth would have evolved more quickly due to mutations in the DNA of early cells.

The photosynthetic bacteria would have lost the radiant energy source they use to make chemical energy and would have died out.

The photosynthetic bacteria would have turned to aerobic respiration for chemical energy production.

Photosynthetic bacteria on land would have depended on the higher energy UV light to make chemical energy instead.

Question

Biology

Kamila Woodward

28 July, 08:59

Scientists think that oxygen produced by the first photosynthetic bacteria contributed to the creation of the ozone layer we have today. If the ozone layer blocked visible instead of UV radiant energy, what do you think would have happened to life on early Earth?

Life on Earth would have evolved more quickly due to mutations in the DNA of early cells.

The photosynthetic bacteria would have lost the radiant energy source they use to make chemical energy and would have died out.

The photosynthetic bacteria would have turned to aerobic respiration for chemical energy production.

Photosynthetic bacteria on land would have depended on the higher energy UV light to make chemical energy instead.

+4

Answers (2)

Know the Answer?

Luciana Branch · Answer 1

B) The photosynthetic bacteria would have lost the radiant energy source they use to make chemical energy and would have died out.

Jaiden Goodwin · Answer 2

The correct option is B.

The photosynthetic bacteria need energy from visible light in order to be able to manufacture their foods. If the visible light has been screened out by the ozone layer, then the source of energy for photosynthesis would have been removed and the photosynthetic bacteria would have been forced to die out.