According to scientific evidence, earth’s earliest atmosphere lacked oxygen. Over time, oxygen was added to the atmosphere.Which statements explain how this change occurred and how it affected life on earth?

Choose all answers that are correct.

A.
The addition of oxygen to the earth's atmosphere helped make possible the development of eukaryotic organisms, which need oxygen to carry out many of their life processes.

B.
When cyanobacteria evolved, they carried out photosynthesis. Oxygen is a product of photosynthesis. The addition of oxygen to earth’s atmosphere helped make possible the development of eukaryotic organisms, which need oxygen to carry out many of their life processes.

C.
The addition of oxygen to the earth's atmosphere helped make possible the development of prokaryotic organisms, which need oxygen to carry out many of their life processes.

D.
When cyanobacteria evolved, they carried out photosynthesis. Oxygen is needed to carry out photosynthesis.

Answer:

your answer would be 0.3 meters

To get the meter you have to divide the length 30 value by 100

which will give you 0.3.

Hope this helped! Have an amazing rest of your day :)

Answer: 5.0 x 10-12 M

Explanation:

It is well known that; pH + pOH = 14.

pOH = - log [ OH-]

        =  - log [ 2.0 x 10 ∧-3]

        =  3 - log 2

        =   3  - 0.301 = 2.7 approximately.

recall that, pH + pOH = 14, therefore; pH = 14 - 2.7 = 11.3

pH= - log [ H3O+]

11.3 =  - log [H3O+], take the antilog of 11.3, gives us;

[H3O+] = antilog of - 11.3, which gives 5.0 x 10-12 M

Answer:

some of the barriers impeding the progress  of attaining a more sustainable renewable energy economy include

• structural,

• political and
• perception hurdles

Explanation:

There must be structure on ground which will facilitate the work on renewable energy provision for the people, also there must be a political will on the part of the Government to accelerate the growth of renewable energy and lastly the perception of the people has to be changed toward accepting the best form of produce power through renewable energy rather than  through fossil fuel

Final answer:

The energy levels of an atom are occupied by electrons. These energy levels are often represented as shells, and each level can hold a specific number of electrons. Electrons are crucial in determining an atom's properties.

Explanation:

The energy levels of an atom are occupied by electrons. An atom's structure consists of a nucleus, which is surrounded by the energy levels. These energy levels, often represented as shells, house the electrons. For example, the first energy level can accommodate up to 2 electrons, while the second energy level can hold up to 8. These electrons play a critical role in determining the physical and chemical properties of atoms and subsequently, the substances they form.

Learn more about Electrons here:

brainly.com/question/34085707

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Answer: a

Explanation:  a naturally occurring, inorganic solid that has a crystal shape and a definite chemical composition" is the one among the following choices given in the question that is the correct definition of minerals. The correct option among all the options that are given in the question is the first option. I hope it helps you.