Skip to content
Back to quiz
6. mutations can be
- always very good
- neutral, advantageous, disadvantageous
- always very dangerous
- never good or bad
7. what can increase the rate of mutation
- radiation and some chemicals
- animals breeding faster
- temperature and enzymes
- nothing
8. what is a mutation
- planned adaption to genetic material that is predictable
- a random change to genetic material
- an adaptation that is always favourable
- variation of genetic material
9. what happens after random mutations take place in each group
- nothing
- natural selection selects for different mutations due to different selection pressure in each group
- a new species is formed
- the different populations become further separated by an isolating barrier
10. what happens in natural selection
- selection pressure cause the animals's alleles to change and some die out
- new organisms are created
- the best adapted survives, passing on favourable alleles that confer the selective advantage
- animals fight until someone dies
11. why can alleles lead to animals being better adapted to their surroundings
- because all animals need new genes
- because it changes their environment so their better suited
- because they lead to adaptations, variation in a population allows them to evolve over time
- because it effects their offspring and allows them to be stronger
12. what is speciation
- the process in which a new species is formed
- when species die out
- the process in which animals adapt over time
- when species interbreed
13. when does natural selection occur
- when there are selection pressures
- when selection pressures die down
- randomly
- when an area is overpopulated