NCERT Solutions for Class 12 Biology chapter 7 – Evolution is available here in PDF format for free download. These NCERT solutions include solved questions for all the questions provided in class 12 Biology NCERT textbooks.
The class 12 Biology chapter 7 solutions are very helpful for both CBSE Board exams and other medical entrance exams. By practicing questions from this book, students can become perfect and score better in their exams. The NCERT Solutions pdf are prepared by our subject experts and students can either download these pdf files freely from our website BYJU’S or can also practice the questions online.
The animals that we see now are the result of millions of years of evolution. This is brought about by organisms adapting to the changing environment or risk dying and becoming extinct. The earliest human ancestor didn’t even look remotely human – it was no larger than a millimeter and was the stepping stone in the evolution of fish and eventually, to humans.
Similarly, did you know that the whale’s earliest ancestor was completely terrestrial mammal – meaning that it lived on dry land and it slowly adapted to its aquatic environment over the course of millions of years – and it looked like a strange rendition of the modern day wolf. And bonus fact: Recent research has shown that hippos are the closest living relative to whales as they shared a common ancestor many million years ago.
NCERT Solutions for Class 12 Biology chapter 7 deals with the aspect of Evolution. It tells us how the different types of organisms that are alive today evolved over the course of many millenia. There are whole classes of organisms that have evolved, dominated the earth and became extinct for various reasons. Most of these organisms that died out millions of years ago most likely have modern day ancestors that have adapted to today’s environment. For instance, we all know that dinosaurs died out many million years ago – 65 million years ago to be precise. But did you know that they have a modern day ancestor? Birds are the most direct ancestors to dinosaurs and it has been proved through the help of fossils.
Furthermore, this is reinforced by the fact that all birds living today have feather on at least some parts of their body – This same feature was also discovered in dinosaurs that went extinct millions of years ago. Giant carnivorous dinosaurs like Tyrannosaurus Rex have been theorized to have had feathers on its body, but it’s still a controversy as there are not enough fossils that to prove the same. Class 12 Biology chapter 7 tells us that evolution gives rise to new species over the course of many years and the species that do not adapt to the change eventually die out and become extinct.
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