Populations and evolution

Question 1

Suggest and explain how 2 types of cat evolved as separate species from ancestral population (4)

Answer 1

Ancestral species became isolated from one another
Natural selection causes allelic frequencies to differ between 2 populations
Due to different selection pressures
Populations changed so much that they could no longer interbreed

Question 2

Describe how the mark-release-recapture method works

Answer 2

Sample of species is captured, marked and released back into the ecosystem
Given sufficient time to mix with rest of population before second sample is taken