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It is thought that life could not have existed on land until the ozone layer formed about 2 billion years ago Why does life on land require an ozone layer?
Wiki User
∙ 9y ago
Life started to occupy the surface of the earth about about 475 million years ago (plants). Insects followed on land 400 million years ago and reptiles at 300 million years ago. The ozone layer started to form after the atmosphere became richer in oxygen due to the evolution of blue-green algae 2 billion years ago. As result the presence of life on the Earth's land surfaces was far removes (in time) from the creation of the ozone layer.The way evolution works is that the existing land life on Earth requires the ozone layer. However if the ozone was mission life may well have developed with alternate ozone protection (shells, UV reflective colours, a more UV resistant chemistry. present life would not do well in a high UV environment but this is not to say that land life could not have developed in such an environment.
Wiki User
∙ 9y ago
The ozone layer protects life on land from harmful ultraviolet (UV) radiation from the sun. UV radiation can damage DNA and harm living organisms. The ozone layer acts as a shield, absorbing most of the incoming UV rays, allowing life to thrive on land.
Wiki User
∙ 8y agoThe abundance of ultraviolet radiation would have destroyed them.
there was no carbon dioxide until the atmosphere formed for the plants to breathe
Wiki User
∙ 13y agothere was no carbon dioxide until the atmosphere formed for the plants to breath
Wiki User
∙ 9y agoComplex Organisms couldn't develop before ozone. It was because of UV rays that kept destroying them.
Wiki User
∙ 9y agoLife on land require ozone. It is because it block UV which block the life formation.
Wiki User
∙ 9y agoWithout ozone there was no life. Mankind will also not exist.
Wiki User
∙ 9y agoComplex organisms could not develop before ozone. It was because of UV entering earth.
Wiki User
∙ 9y agoyes
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What continent formed in 0.7 billion years ago?
Rodinia was the continent that existed 0.7 bya.
When was Rodinia formed?
Rodinia is believed to have formed around 1.3 billion years ago during the Mesoproterozoic Era. It was a supercontinent that existed before Pangaea.
Were rocks that are 3.5 billion years present when earth was first formed?
No, rocks that are 3.5 billion years were not present when earth was first formed. Earth formed about 4.6 billion years ago.
What date was earth created?
The Earth was formed around 4.5 billion years ago, based on scientific estimates using radiometric dating of rocks and meteorites.
Landmass that existed 750 million years ago?
One of the major landmasses that existed around 750 million years ago is the supercontinent Rodinia. Rodinia was a precursor to Pangaea and is believed to have formed around 1.3 billion years ago before breaking apart around 750 million years ago.
It is thought that life could not have existed on land until the ozone layer formed about 2 billion years ago. Why does life on land require an ozone layer?
Because the ozone layer provides a thin layer of protection from the harmful UV rays or ultraviolet rays.
How long has the earth existed for?
The Earth is estimated to be around 4.5 billion years old. Scientists have used various dating methods to determine the age of our planet.
What continent formed in 0.7 billion years ago?
Rodinia was the continent that existed 0.7 bya.
Is it through that life could not have existed on land until the ozone later formed about 2 billion years ago why does life on land require an ozone layer?
Life on earth requires an ozone layer. It is because it absorbs the fatal UV rays of the sun.
When did land start to exist on earth?
The Earth formed some 4 to 5 billion years ago. Solid land formed as it cooled about 2.5 and 3.8 billion years ago. No seas existed until the Earth had cooled enough not to boil water back into vapour.
How long has the earth been here?
Current estimate of the Earth's age is about 4.5 billion years. The total age of the Universe (Big bang until now) is about 15 billion years.
Scientist believe that the more distant galaxies are formed when?
scientists believe that more distant galaxies formed when the universe was younger and gas clouds began to collapse under the force of gravity, leading to the formation of stars and galaxies. This process took place over billions of years, shaping the structure of the universe as we see it today.
What is meant by ganadwanaland?
Gondwanaland ?Its the continent that existed about half a billion years ago and was formed from what now is South America, Africa, Antarctica , Australia, Arabia, Madagaskar, New Guinea and India.
When did Mrcury become a planet?
The planet Mercury, along with the other planets in our solar system, is thought to have formed about four and a half billion years ago.
Were rocks that are 3.5 billion years present when earth was first formed?
No, rocks that are 3.5 billion years were not present when earth was first formed. Earth formed about 4.6 billion years ago.
How was God formed?
Christians believe that God has always existed, He was not formed.
Billions of years ago galaxies existed in?
Galaxies. They are just about the same now as they were then. 14 Billion years ago, astronomers believe that the "Big Bang" created matter from energy, which is how they believe galaxies were formed.
