Around 4.1 billion years ago the first single celled organism appeared
Answer: The answer is B.
They can be any class of sugar glucose etc.
Hold on i’ll answer this in 5 minutes while i research it.
When we want to get a bacterium to make a chemical normally made by a human, we take the gene from the human and put it into the bacterium by using a bacterial enzyme known as <u>DNA ligase</u>
<h3>What is are bacteria?</h3>
Bacterial are microscopic unicellular organisms which are made of prokaryotic cells. They reproduce asexually.
Some bacteria which are saprophytes; organisms which feed on dead and decaying organisms while some bacteria are parasites.
So therefore, when we want to get a bacterium to make a chemical normally made by a human, we take the gene from the human and put it into the bacterium by using a bacterial enzyme known as <u>DNA</u> <u>ligase</u>
Learn more about bacteria:
brainly.com/question/1424688
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