Chat with tutor

Ask Questions, Get Answers

Questions  >>  CBSE XII  >>  Biology

What are the key concepts in the evolutionary theory of Darwin?

What are the key concepts in the evolutionary theory of Darwin?

1 Answer

Branching descent and Natural selection are the two key concepts in the evolutionary theory of Darwin.
Organisms have very high or biotic or reproductive potential . It produces a very large  number of progeny.
Ecological niches , food and space are limited.
Due to large in number of individuals and limitations of food and space, a struggle for existence ensures.
Due to reproductive shuffling, a large number of random variations occur in each individual. Some variations have selective advantages and in particular environments, they survive and are able to reproduce.
Since there are several types of ecological niches, a number of variants would survive with time; variations providing adaptability to particular environments will accumulate and give rise to different species- branching descent.

Help Clay6 to be free
Clay6 needs your help to survive. We have roughly 7 lakh students visiting us monthly. We want to keep our services free and improve with prompt help and advanced solutions by adding more teachers and infrastructure.

A small donation from you will help us reach that goal faster. Talk to your parents, teachers and school and spread the word about clay6. You can pay online or send a cheque.

Thanks for your support.
Please choose your payment mode to continue
Home Ask Homework Questions
Your payment for is successful.
Clay6 tutors use Telegram* chat app to help students with their questions and doubts.
Do you have the Telegram chat app installed?
Already installed Install now
*Telegram is a chat app like WhatsApp / Facebook Messenger / Skype.