CAIE A-Level Biology 17.3 Evolution Question Bank

any three from:

1 formation of new species from, pre-existing species / common ancestor ;

2 change in, characteristics / phenotypes ;

3 over, time / generations ;

4 natural selection ;

5 changes in, gene pools / allele frequencies

or genetic drift ;

any three from:

1 compare sequences (of DNA) ;

2 the more similar the sequences the more, closely related the species / recent the common ancestor ; ora

3 over time mutations accumulate or less time fewer mutations occurred ;

4 ref. to bioinformatics / software / database ;

5 AVP ; e.g. molecular clock / constant rate of mutation

e.g. mtDNA has no crossing over e.g. the percentage similarity can be used to build a phylogenetic tree