AO1

Knowledge and understanding: demonstrate understanding of the power and limitations of scientific ideas and factors affecting how these ideas develop  

(Adapted from page 3)

AO2

Evaluate scientific information and make informed judgments from it

(Adapted from page 4)

3.3.21

Understand how variation and selection may lead to evolution or extinction, including:

• natural selection as variation within phenotypes and competition for resources leading to differential survival;
  
• the implications of natural selection for the concept of evolution as a continuing process.

Grade A requirement:

Candidates explain how scientific theories can be changed by new evidence and identify some areas of uncertainty in science.