A currently living animal I can trace its evalutionary history?

Question

What is a currently specific living animal that I can trace their evalutionary history? PLEASE?

Answer 1

horse
The evolution of the horse involves the gradual development of the modern horse from the fox-sized, forest-dwelling Hyracotherium. Zoologists have been able to piece together a more complete picture of the modern horse's evolutionary lineage than that of any other animal.

Horses belong to an order known as the Perissodactyls, or "odd-toed ungulates", which all share hoofed feet and an odd number of toes on each foot, as well as mobile upper lips and a similar tooth structure. This means that they share a common ancestry with tapirs and rhinoceros. The Perissodactyls originally arose in the late Paleocene, less than 10 million years after the extinction of the dinosaurs. This group of animals appears to have been originally specialized for life in tropical forests, but whereas tapirs and, to some extent, rhinoceri, retained their jungle specializations, horses instead adapted to life on dryer land in the much-harsher climatic conditions of the steppes.

The early ancestors of the modern horse walked on several spread-out toes, an accommodation to life spent walking on the soft, moist grounds of primeval forests. As grass species began to appear and flourish, the equids' diets shifted from foliage to grasses, leading to larger and more durable teeth. At the same time, as the steppes began to appear, the horse's predecessors needed to be capable of greater speeds in order to outrun predators. This was attained through the lengthening of limbs and the lifting of some toes from the ground in such a way that the weight of the body was gradually placed on one of the longest toes, the third.


Evolution of cetaceans
The cetaceans (whales, dolphins and porpoises) are descendants of land-living mammals, and remnants of their terrestrial origins can be found in the fact that they must breathe air from the surface; in the bones of their fins, which look like huge, jointed hands; and in the vertical movement of their spines, characteristic more of a running mammal than of the horizontal movement of fish. The question of how land animals evolved into ocean-going behemoths has been a mystery for a long time, owing to gaps in the fossil record. However, recent discoveries in Pakistan have managed to solve many of these mysteries, and it is now possible to see several stages in the transition of the cetaceans from land to sea.

Answer 2

1

Answer 3

Human

Answer 4

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Answer 5

ummmmm the horse...the horse back in the day was the same size as a small dog with several hoofed toes, and now its clearly not the same..

i remember this from the natural science center at home =)
good luck!

Answer 6

the alligator or crocodile is a good one. the discovery channel recently showed a thing about that

Answer 7

The cockroach. No kidding. OR the dragonfly.

Answer 8

have you tried lizzards (komodo dragons) or alagators or fish or jelly fish or turtles or any reptilillian that has an hard exo- skelton (roach)

Answer 9

monkeys of course and snakes frogs....mosquitos used to be huge