Variation & Evolution

Question 1

Species

Answer 1

A group of organisms that are capable of interbreeding & producing fertile offspring.

Question 2

2 types of variation

Answer 2

Sexual reproduction
Mutations

Question 3

Mutation

Answer 3

A change in the amount or structure of DNA.

Question 4

2 types of mutation + examples

Answer 4

Gene Mutation - Cystic Fibrosis
Chromosome Mutation - Down Syndrome

Question 5

2 causes of mutations

Answer 5

Radiation eg UV rays
Chemicals eg tobacco smoke

Question 6

Evolution

Answer 6

A gradual change in the characteristics of a species over a long period of time, leading to the formation of a new species.

Question 7

Scientists credited with the Theory of Evolution

Answer 7

Darwin + Wallace

Question 8

Evidence of evolution

Answer 8

Structural similarities between species
Same basic patterns of bones
E.g. pentadactyl limb

Question 9

Mutagens + examples

Answer 9

Outside agents that cause mutations
Radiation (x-rays)
Chemicals (tobacco smoke)

Question 10

Variation

Answer 10

Differences between members of the SAME species.