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Question

Thanks.

How would the composition of earth's atmosphere change if green plants and other autotrophs disappeared? Explain why?

How would animal life be affected by this atmospheric change?

Answer 1

First of all people wouldn't get any oxygen because autotrophs are the ones that produce it . If the autotrops diappeared so would any animal life that needs oxygen to survive.

There are two cycles (photosynthesis and cellular respiration). One's product is the other's start, so if you wipe out one of the cycle then the other would be gone just as well.

Answer 2

Autotrophs, by definition, are the only organisms capable of getting the energy they need to survive directly from the sun. If there were no autotrophs, there would be no foo dfor the rest of the planet. All animal life would die out.

As for the atmosphere, autotrophs generally take in CO2 and produce O2, the opposite of the rest of us. So you might say that the CO2 content of the atmosphere would rise. However, since there would very soon after be no animals to produce CO2 either, I'm not sure the atmosphere's composition would change very much.

Answer 3

There would be less oxygen and more carbon dioxide. Plants and autotrophs produce glucose by removing CO2 from the air and Adding O2 at the end so there would be more CO2. There would also be severe case of GLOBAL WARMING. With so much carbon Dioxide in the air, Temperatures would climb rapidly, changin the temperature and disturbing life everywhere. THis means animals would start to dissapear since many islands would be under water and many organisms not adapted to Warm temperatures would die out. Without Plans and other autotrophs, there would be no life on earth except Bacteria and Archea which can survive without plants and are used to extreme conditions.

Answer 4

Ozone is composed of oxygen atoms .. and where do most oxygen molecoles/atoms come from ? plants! so yes the composition of earth's atmosphere will respond to extinction of plants.

Second question. 100% radiation from the sun can damage bodily tissues, the ozone protects life on earth by absorbing and reflecting most of these harmful rays. So the earth's surface will be exposed to more of these harmful rays as ozone fades away

Answer 5

Just want to answer the second part, i.e. how would animal life be affected?

Well there would be no oxygen. Based on what the teachers, scientists and theorists have told us, in the past when things changed animal life evolved to cope with the changes. So I guess animal life would evolve to live without oxygen. Doesn't this show just how silly the evolution theory really is?

Answer 6

we all need oxygen to breath and if all the green plants were to disappear what will we breath????????All animals will die!!!