CB4b Darwin's Theory

Question 1

Describe how one characteristic of African elephants has evolved

Answer 1

An African elephant has large ears

Question 2

Darwin’s Theory: Genetic Variation

Answer 2

Differences between organisms caused by differences in the alleles they inherit from their parents, or differences in genes caused by mutation

Question 3

Darwin’s Theory: Evironmental change

Answer 3

Conditions in an area change. For example, the lack of resource (like food) causes more competition between organisms

Question 4

Darwin’s Theory: Competition

Answer 4

When organisms need the same resource as eachother, they struggle against eachother to get those resources

Question 5

Darwin’s Theory: Natural Selection

Answer 5

By chance, the variations of some individuals make them better at coping with change than others and more likely to survive. (Survival of the fittest)

Question 6

Darwin’s Theory: Inheritance

Answer 6

The suvivors breed and pass on their varations to their offspring. The next generation contains more individuals with better adapted variations

Question 7

Darwin’s Theory: Evolution

Answer 7

If the environmental conditions remain changed, natural selection occurs repeatedly and new species evolve with all having better adapted variations

Question 8

Woolly mammoths and elephants evolved from the same animal; they share a…

Answer 8

common ancestor

Question 9

Resistant

Answer 9

Unaffected or or less affected by something

Question 10

Explain how antibiotic resistance in bacteria provides evidence to support Darwin’s theory?

Answer 10

Antibiotic resistance supports Darwin’s theory because after a change in environment (antibiotics), some bacteria were more resistant to the change than others. Only these bacterium survived the new conditions and were able to pass on their variations to their offspring.