Question

explain six points on tetrapoda​

Answer 1

Explanation:

Tetrapods (/ˈtɛtrəpɒd/; from Greek: τετρα- "four" and πούς "foot") are four-limbed (with a few exceptions, such as snakes) animals constituting the superclass Tetrapoda. It includes extant and extinct amphibians, reptiles (including dinosaurs and therefore birds), and mammals. Tetrapods evolved from a group of animals known as the Tetrapodomorpha which, in turn, evolved from ancient sarcopterygians (lobe-finned fishes) around 390 million years ago in the middle Devonian period;[3] their forms were transitional between lobe-finned fishes and the four-limbed tetrapods. The first tetrapods (from a traditional, apomorphy-based perspective) appeared by the late Devonian, 367.5 million years ago.[1] The specific aquatic ancestors of the tetrapods and the process by which they colonized Earth's land after emerging from water remains unclear. The change from a body plan for breathing and navigating in water to a body plan enabling the animal to move on land is one of the most profound evolutionary changes known.[4][5] The first tetrapods were primarily aquatic. Modern amphibians, which evolved from earlier groups, are generally semiaquatic; the first stage of their lives is as fish-like tadpoles, and later stages are partly terrestrial and partly aquatic. However, most tetrapod species today are amniotes, most of those are terrestrial tetrapods whose branch evolved from earlier tetrapods about 340 million years ago (crown amniotes evolved 318 million years ago). The key innovation in amniotes over amphibians is laying of eggs on land or having further evolved to retain the fertilized egg(s) within the mother.

Tetrapods

Temporal range:

Late Devonian - Present [1]

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Extant tetrapoda.jpg

Representatives of extant tetrapod groups, (clockwise from upper left): a frog (a lissamphibian), a hoatzin and a skink (two sauropsids), and a mouse (a synapsid)

Scientific classificatione

Kingdom:

Animalia

Phylum:

Chordata

Clade:

Eotetrapodiformes

Clade:

Elpistostegalia

Clade:

Stegocephalia

Superclass:

Tetrapoda

Jaekel, 1909[2]

Subgroups

Batrachomorpha

various extinct clades

Amphibia

Reptiliomorpha

various extinct clades

Amniota (Crown group)

Synapsida

Sauropsida

Answer 2

Hii mate..

here's ur answer...

1)The word "Tetrapoda" means "four legs" in Greek.

2)Amphibians, reptiles (including dinosaurs and birds) and mammals are the major groups of the Tetrapoda.

 

3)Tetrapods include all land-living vertebrates, such as frogs, turtles, hawks, and lions.

4)The group also includes a number of animals that have returned to life in the water, such as sea turtles, sea snakes, whales and dolphins, seals and sea lions, and extinct groups such as plesiosaurs, ichthyosaurs, and mosasaurs.

5)Some tetrapods, like whales and snakes, have lost some or all of the four limbs that their ancestors had, but because of their ancestry they are still grouped as tetrapods.  

6)Tetrapods are part of a larger groups called Sarcopterygii, which also includes several groups of lobe-finned fish, such as lungfish and the coelacanth. The Sarcopterygii are just one group of vertebrates, or animals with a backbone.

hOpe iT helPs.....