In DNA, four bases have been found. They are adenine (A), guanine (G), cytosine (C) and thymine (T). The first three of these bases are found in RNA also but the fourth which is uracil (U) is absent in it. RNA contains cytosine and uracil as pyrimidine bases while DNA has cytosine and thymine.
Answer:
One of the probable ways to determine how long ago any two species of bacteria diverged from each other is by drawing a phylogenetic tree.
Explanation:
- Phylogenetic tree are trees that show the ancestry of two species of interest and the relationship between them.
- The idea behind the construction of phylogenetic tree is darwins's "descent with modification theory".
- A phylogenetic tree is constructed using the similarities or differences in either physical characteristics, behavorial, or genetic buildup.
- Derived traits shared between the different species are the actual data used to construct a phylogenetic tree.
Answer:
A
Explanation:
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The statement given is the function of RNA.There are three types RNA. Messenger RNA (mRNA) molecules carry the coding sequences for protein synthesis. Rribosomal RNA (rRNA) molecules form the ribosomes, ribosomes are the site of protein synthesis. Transfer RNA (tRNA) molecules carry amino acids and add to the chain of amino acids to form polypeptide chain or protein molecule.