During which era was the earth dominated by mostly single-celled organisms?

2 answers:

6 0

The first known single-celled organisms appeared on Earth about 3.5 billion years ago, roughly a billion years after Earth formed. More complex forms of life took longer to evolve, with the first multicellular animals not appearing until about 600 million years ago.

charle [14.2K]3 years ago

4 0

I think it’s Proterozoic era where life on Earth was mostly single-celled and small.

You might be interested in

9. Isotherms are lines that connect points of equal

grandymaker [24]

Answer:

I believe the answer is Temperature.

3 0

3 years ago

what is the name of the cycle that converts inorganic carbon dioxide into a carbohydrate molecule a plant can use

mote1985 [20]

Answer:

Photosynthesis.

Explanation:

Photosynthesis is the process by which photosynthetic organisms such as plants and algae turn inorganic carbon compounds (usually carbon dioxide) into organic carbon compounds (usually carbohydrate sugars such as glucose). It causes carbon to move from one reservoir to another; examples are photosynthesis, respiration and combustion.

6 0

3 years ago

Consider three molecules, named X, Y, and Z. When added to a beaker of water they undergo spontaneous reactions. When X is added

harina [27]

Both X and Z will increase in order.

Option D.

<h3><u>Explanation:</u></h3>

Here in the question we can see that all the three compounds X Y and Z are in equilibrium as they are put in a water beaker containing water. This phenomenon is Called chemical equilibrium when the substances that are isomers to each other actually forms in water and their relative concentration remains in a particular ratio according to their stability.

Here in the question, the solution contains X Y and Z in equilibrium. But if more Y is added in the solution, firstly the equilibrium constant for X and Y will get disrupted because X will get low in amount with respect to Y. So some Y will get converted to X. Similarly, when Z will also face the same problem and some Y will get converted to Z. Hence the amounts of both X and Y will increase along with Y.

7 0

3 years ago

Which of the following statements are true about enzymes? Select all that apply.

Andrews [41]

Answer:

2, 3 and 5

Explanation:

Enzymes lower the activation energy, making life possible to occur as the reactions can happen quickly. But, they can be affected by temperature or pH, and they are always being constantly reused over and over in reactions.

6 0

3 years ago

If one strand of dna is cggtac, then the corresponding strand would be

Vilka [71]

It would turn into GCCATG

8 0

3 years ago