Which organism's ancestors diverged first?

The organism labelled 2 diverged first.

The correct answer is option b.

Explanation:

The arrows in the diagram indicates the timeline. The branching point shows the event of divergence in a species.

From the diagram the divergence or internal node is shown at point C.

At point C, 2 and 3 are the new species. C is the recent ancestor of the species 2 and 3.

The ancestors of organism 2 diverged first because the timeline is also short in case of species 2.

the C internode or recent ancestor diverged in to 2 different species 2 and 3.

answer: the correct option is d. enzyme

lactase and carbonic anhydrase are the examples of enzymes.

lactase is an enzyme, which is present in the small intestine of mammals. it in the digestion of the disaccharide, lactose ( milk sugar) by converting it into two monosachharide, which are glucose and galactose.

carbonic anhydrase is present in the red blood cells. this enzyme plays significant role in the transport of co₂. it in the conversion of co₂ and h₂o into carbonic acid, which is then dissociated into bicarbonate ions and hydrogen ions.