The class 12 Biology chapter 7 solutions are very helpful for both CBSE Board exams and other medical entrance exams. By practising 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.
Class 12 Biology NCERT Solutions for Evolution
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 millimetre and was a 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.
Subtopics of Chapter 7 Evolution
- Origin of Life
- Evolution of Life Forms – A Theory
- What are the Evidence for Evolution?
- What is Adaptive Radiation?
- Biological Evolution
- Mechanism of Evolution
- Hardy – Weinberg Principle
- A Brief Account of Evolution
- Origin and Evolution of Man.
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 years. 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 mostly 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.
Class 12 Biology NCERT Solutions Evolution Important Questions
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Furthermore, this is reinforced by the fact that all birds living today have the 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 controversy as there are not enough fossils to prove the same.
Class 12 Biology chapter 7 tells us about evolution giving 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.