Explain Darwins theory of evolution by natural selection (5 marks)

A mutation will randomly occur in individuals within a species, providing a larger variation in genes. This mutated gene may produce characteristics which are beneficial for the individual in their environment. This means they are more likely to survive than those without the gene and are therefore more likely to reproduce and pass on the beneficial gene to their offspring. Individuals without the gene however, are less likely to survive and therefore will not be able to pass their genes on to offspring. Over time the advantageous gene will become more common within the species and they will gradually evolve.

ER
Answered by Elisha R. Biology tutor

9789 Views

See similar Biology GCSE tutors

Related Biology GCSE answers

All answers ▸

Describe which neurones are involved in coordinating a reflex action.


Describe and explain how blood in the right ventricle travels to the left atrium in the heart


What is the difference between the xylem and phloem?


Biology AQA Past Paper (2015) - Unit 03 (Higher). Describe how the brain monitors body temperature.


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning