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Pani-rosa [81]
3 years ago
12

When does a fetus develop a nervous system?

Biology
1 answer:
katovenus [111]3 years ago
8 0
The fifth week of pregnancy.
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The Lorax
Temka [501]

The Modern World, where everything is artificial and ephemeral; where you have to pay for a "need" created or for clean air.

The greed of man to generate wealth and status regardless of the impact it generates on his environment, to be accepted by his family and society.

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Children living in the Modern World, who know little about the nature and the effect of our actions on the environment.

Caring for the environment is in the hands of the new generations, especially those who really care.

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2 years ago
Can abiotic factors be composed of cells?
Sonja [21]
No abiotic things are non-living, and cells are living.
8 0
3 years ago
Read 2 more answers
What is the building block of DNA?
Bogdan [553]
Deoxyribonucleoside Triphosphate, which is the more specific form of Deoxyribonucletides.

When DNA is synthesised by DNA polymerase by complimentary base pairing, 2 phosphate groups from Deoxyribonucleoside Triphosphate breaks away, releasing energy from the binding of the Deoxyribonucleotide to the adjacent Deoxyribonucleotide molecule via phosphodiester bond. These molecules will be called Deoxyribonucleoside Monophosphates.

Thus, the general name of the building block of DNA is Deoxyribonucleotide, and the more specific names depend on at which stage of DNA replication you are referring to.

Hope this helps! :)
6 0
3 years ago
Read 2 more answers
Which process takes place in meiosis but not in mitosis
Dvinal [7]

Answer:

The answer is DNA replication and crossing over.

Explanation:

Both meiosis and mitosis are reproduction processes taking place in humans. But there is some difference between these two processes. In meiosis, parent cell produces four daughter cells which are not identical to each other.

In meiosis, when DNA replicates it produces four haploid daughter cells in which the number of chromosomes in half. Moreover crossing over and separation of chromosomes also occurs to produce sperms and egg cells. While in mitosis crossing over and DNA replication is absent.

8 0
3 years ago
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