Mechanisms of evolution

Question 1

natural selection

Answer 1

the process of benefiecial genes being favoured in a species, through better traits offering greater chances of reproduction. A subtype is sexual selection, which focuses on constructed mating pressures to create advantageous mating traits.

Question 2

gene drift

Answer 2

random chance causing alleles to shift and change. no external pressures cause this, rather random chance and small populations cause it to have stronger effects

Question 3

gene flow

Answer 3

the exchange of genes between species populations. can ever cause species to speciate, as the adaptations caused may be negative