Question

3. When looking at the DNA of an elephant, a crocodile, and a sheep., which two animals do you

Answer 1

Answer:

The elephant and the sheep exhibit higher sequence similarity because they are more closely phylogenetically related

Explanation:

The elephant and the sheep are mammals, while the crocodile is a reptile, being the mammals the most inclusive group among these three species and it appeared later in evolution. Mammals are organisms that have shared evolutionary features such as warm blood, they produce milk and have hair

Answer 2

Answer:

The elephant and the sheep are genetically closer to each other than they are to crocodiles.

Explanation:

Reptiles and mammals share a common ancestor. Mammals got separated from reptiles and evolved to explode different ecological niches.

The subclass Synapsid is a reptilian groups that precedes mammals in evolution. The therapsid order is an advanced group of synapsids and the direct ancestor of mammals.

Crocodiles are reptiles, while elephants and sheep are terrestrial mammals. According to phylogenetic evolution, crocodiles sheep and elephants share a common ancestor, but during evolution, the mammals' group (sheep and elephants) got separated from reptiles (crocodile).

Sheep and elephant got separated later in the evolution.

There are physical traits that confirm this.

Reptiles are cold-blooded animals,  have squamous skin, vertical pupils, they are oviparous so they lay eggs were the embryo develops,

On the other hand, mammals are warm-blooded animals, have hair in the skin, females have milk glands, and they are viviparous so the embryo develops in the placenta.