1. discuss the phylogenetic relationships between major clades of vertebrates (jawless fishes, chondrichthyes, actinopterygii, sarcopterygii, amphibia, reptilia,mammalia), the major characteristics of each (and adaptive value of such characteristics) and the points on the phylogenetic tree where major adaptations appeared, such as vertebral column, endoskeleton, cranium, jaws, lungs (or derivatives), lobe fins, limbs, amniotic egg and hai

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14-11-2022
Biology

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1. discuss the phylogenetic relationships between major clades of vertebrates (jawless fishes, chondrichthyes, actinopterygii, sarcopterygii, amphibia, reptilia,mammalia), the major characteristics of each (and adaptive value of such characteristics) and the points on the phylogenetic tree where major adaptations appeared, such as vertebral column, endoskeleton, cranium, jaws, lungs (or derivatives), lobe fins, limbs, amniotic egg and hai

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BhavikaKukreja BhavikaKukreja · Answer 1 · 2022-11-18T05:53:53+01:00

Jawless fishes come under class agnatha, Chondrichthyes comes under Pisces, Actinopterygii includes ray-finned fishes, and sarcopterygian includes lobe-finned fishes.

What is a phylogenetic relationship?

It is the study of the relationship among organisms of a species or a population through evolution. It enriches our understanding of how genes, genomes, and species evolve.

Pisces has two types of vertebral column trunk and caudal vertebrae, cartilaginous fishes have cartilage endoskeleton, and bony fishes have bone endoskeletons, respiration occurs through gills, Fishes and amphibians are amniotes.

Amphibians, reptiles, and mammals have axial and appendicular endoskeletons. Amphibia, reptilia and Mammalia have dicondylic skull, four limbs, respiration through lungs, and a vertebral column.

Sarcopterygii and Actinopterygii are two groups of Osteichthyes which have a bony endoskeletons.

Hence, Pisces, amphibia, reptilia, Mammalia have almost similar characteristics that differ only in the endoskeleton.

Learn more about Phylogenetic relationships from the link given below:

https://brainly.com/question/2189834?utm_source=android&utm_medium=share&utm_campaign=question

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