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timama [110]
3 years ago
9

For what part of the day did only unicellular life-forms exist?

Biology
1 answer:
Ronch [10]3 years ago
6 0

Question:

For what part of the day did only unicellular life-forms exist?

Answer:

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.

Question:

At what time of day did the first plants appear on earth?

Answer:

The first land plants appeared around 470 million years ago, during the Ordovician period, when life was diversifying rapidly. They were non-vascular plants, like mosses and liverworts, that didn’t have deep roots.

Question:

At what time of day did mammals appear on earth?                

Answer:

The period between the extinction of the dinosaurs and the present day is called the Age of Mammals or Cenozoic. Mammals appeared on the earth long before the extinction of the dinosaurs; in fact, dinosaurs and mammals originated within 10 million years of each other, in the late Triassic about 200 million years ago.

Cheers!

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Drawing a cartoon in pencil, then going back over it later with an ink pen is most similar to which biological process?
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Given that the main reason for which an artist will retrace a drawing in pen is to <u>correct errors </u>and achieve a <u>final draft</u>, we can compare this to the biological process of DNA proofreading.

DNA proofreading is a <u>biological process </u>that takes place during the biosynthesis of DNA. During this time, a chain of <u>DNA </u>is read and a complementary chain is creating, <u>effectively duplicating the genetic code</u>.

During this process, DNA proofreading takes place. This is described as a process in which the DNA polymerase retraces the genetic code, detecting and fixing any errors in the synthesis before the strand is closed once again.

The fact is that both processes, despite taking place in astronomically different situations, share a final goal which is to prepare the "product" for the "final draft". This allows us to draw <u>valid</u> <u>comparisons </u>between the retracing of a <u>cartoon </u>and the <u>proofreading </u>of <u>DNA </u>by the DNA polymerase enzyme.

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4 0
2 years ago
The car is blue. What does that tell you about the light interacting with it?
Anna [14]

Answer:

A

Explanation:

because blue is being reflected, all other colors of light are being absorbed by the car.

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3 years ago
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Dolphins, on the other hand, are  regarded as one the most intelligent animal.

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Explanation:

Hope it helps.

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