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ladessa [460]
3 years ago
5

40 POINTS AND BRAINLY

Biology
1 answer:
erastova [34]3 years ago
3 0

Because the RNA molecules that are in most organisms can’t replicate themselves. Further, the RNA molecule that is in most organisms can’t transcribe its information on the DNA.

The DNA molecule readily replicates itself under the right conditions. The reason that DNA molecules replicate themselves much easier than RNA molecules is because DNA has a double helix structure.

The double helix can unzip down the middle, creating two molecules with complementary information.The RNA is generally a single string of base pairs. RNA isn’t double anything. So an RNA molecule usually can’t divide into two molecules with complementary informaiton.

That being said:

RNA molecules in some virus species can replicate itself. This RNA can transcribe information onto the DNA of the host organism.

RNA molecules with a certain structure under the right conditions can replicate themselves. However, replication in RNA is not as reliable as replication of DNA. That is one reason that RNA viruses mutate at a much faster rate than most DNA viruses.

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7 0
3 years ago
Scientists describe a period called the Great Acceleration, in which human activities began significantly altering global system
victus00 [196]

<u>Answer:</u>

The invention of agriculture, advances in medical technology that have greatly reduced the human death rate and he rapid increase in the uses of fossil fuels, fertilizers, metal ores, and other resources.

Option: (A), (C) and (D)

<u>Explanation:</u>

  • The Great Acceleration refers to the humanity’s impact upon the Earth’s geology and its ecosystems caused by continual and surge in growth of human activity.
  • It was first recorded in mid-20th century and is continuing to this day. The 'invention of agriculture', advancement in medical technology which reduced the death rate, rapid increase in use of 'fossil fuels', 'fertilizers' and other resources contributed to global changes.
  • Agriculture allowed us to produce more food and population increased rapidly.
  • Fossil fuels created a surge in production of Green House Gases and global temperature began to rise.
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