Variation

Question 1

Define evolution

Answer 1

As a change in the inherited characteristics of a population over time through a process of material selection which may result in the formation of a new specie

Question 2

Natural selection

Answer 2

1) individual in a specie show a wide range of variation due to mutation

2) individual with characteristic most suited to the environment are more likely to survive and reproduce

The gene that allowed the individual to be successful are passed to the offspring in the next generation

Question 3

What happen when not suited

Answer 3

Death

Extinction (for specie)

Question 4

Antibiotics resistance define

Answer 4

A random mutation might cause some bacteria to become resistant to certain antibiotics such as penicillin

Question 5

Antibiotics resistance process

Answer 5

A group of bacteria including genetically resistant ones ar exposed to an antiobiotic

Most of the sensitive ones die

The genetically resistant bacteria start multiplying

Eventually the resistant strain replaces the strain affected by antibiotic

Question 6

Selective breeding define

Answer 6

Artificial selection

Humans to develop new organism with desirable characteristics

Individual with desirable characteristics are selected to breed

Question 7

Steps for selective breeding

Answer 7

1) select the organism with desired characteristics

2) breed them together

3) select the offspring with desired characteristics and breed them together

4) repeat the process for many generations

Question 8

Features of natural selection

Answer 8

Occurs naturally

Results in development of population with features that are better adapted to their environment and survival

Usually takes a long time

Question 9

Features of selective breeding

Answer 9

Occurs when human intervene

Results in the development of population with features that are useful to humans and not necessarily for the survival of individual

Take less time as only individual with desir3d features are allowed to reproduce