Answer:
Not all of the DNA codes for proteins. Infact, majority of the DNA is non- coding. Hence, it is more reliable to convert the DNA into only the coding form i.e mRNA for translation or making of proteins.
The DNA itself cannot travel through the nuclear pores. Hence, converting it into mRNA is necessary.
The process of protein synthesis occurs in the ribosomes. Hence, it is necessary that an mRNA might be present to transfer information of the DNA into the ribosomes for protein synthesis.
<span>Vertebrates and invertebrates</span>
Answer:
They are simply the creatures that can breathe (viewpoint)
<span>No, if new evidence is acquired or new perspectives emerge, scientific ideas can be revised or replaced;</span> as new ideas are introduced, scientists rethink and experiment to prove the hypotheses, and if the evidence is proven true many times, scientific ideas are revised, but not eliminated completely. So science can never be completely true, the ideas are just theories humans try to prove to examine how the universe works.