4 Species formation

Question 1

mutation

Answer 1

random change to genetic material, the only source of new alleles

Question 2

neutral mutation

Answer 2

mutation which gives neither an advantage or disadvantage

Question 3

radiation and chemicals

Answer 3

2 environmental factors which can increase the rate of mutation

Question 4

variation

Answer 4

differences between members of a population which make it possible for it to evolve

Question 5

natural selection

Answer 5

process where only the best adapted organisms survive to reproduce passing on their favourable genes ? survival of the fittest

Question 6

speciation

Answer 6

evolution of new species which occurs after a population is isolated and natural selection follows a different path

Question 7

isolation

Answer 7

where a population becomes separated e.g. by mountains or a river which can lead to speciation

Question 8

selection pressure

Answer 8

factor which can affect a population meaning only those best suited survive .e.g. disease, predators, extreme temperature

Question 9

interspecific competition

Answer 9

competition between organisms of different species

Question 10

intraspecific competition

Answer 10

competition between organisms of the same species