Answer:
DNA ligases
DNA kinases
Explanation:
DNA kinases are enzymes responsible for the regulation of many biological phenomena. By covalently attaching a phosphate group to its target (phosphorylation) a kinase is able to regulate a particular biological reaction. Kinases are virtually involved in almost every signal transduction pathway occurring in a living cell.
DNA ligases are commercially available. Optimally active in the range 45 to 80°C. These enzymes are perfect for ligating adjacent oligonucleotides that are hybridized to the same target DNA. This property can be used for ligase chain reaction ,for mutational analysis, or for gene synthesis.
Aquatic is the answer because they domesticated eels and fish in early history
Explanation:
Palaeontologists study the fossil and once they found that the fossil of an organism in layer 2 and 3. The fossil present in layer 3 is very similar to the fossil present in layer 2.
From this, it could be concluded that the layer 3 possible might be evolved from the fossil present in layer 2. The fossil of layer 3 might be a close relative of the extinct fossil of layer 2 as they could have shared a common ancestor.
Many possibilities could be explained but these two are more valid.
I would go for B, because it is informing other scientists that could've been working on the same subject that here is a possible solution