Evolution of species

Question 1

Mutation meaning?

Answer 1

A random change to an organisms genetic material (DNA)

Question 2

Gene pool meaning?

Answer 2

All of the genes found in a population

Question 3

Meaning of speciation?

Answer 3

The formation of a new species

Question 4

Order of speciation:

Answer 4

Mutations
Natural selection
Offspring

Question 5

Meaning of mutagenic agents:

Answer 5

Can increase the rate at which a mutation occurs

Question 6

Examples of mutagenic agents:

Answer 6

Radiation ( uv rays, X-rays, gamma rays)
Mustard gas

Question 7

What is survival of the fittest:

Answer 7

When organisms which mutations best suit their environment survive

Question 8

What are isolating mechanisms?

Answer 8

Something which prevents interbreeding and gene exchange

Question 9

Types of isolating mechanisms:

Answer 9

• geological barriers
• ecological barriers
• behavioural barriers

Question 10

What are examples of geological barriers?

Answer 10

Mountains, rivers, deserts or the sea

Question 11

What are examples of ecological barriers?

Answer 11

Changes in temperature, pH levels, humidity etc

Question 12

What are examples of behavioural barriers?

Answer 12

Being awake at different times or breeding during different seasons of the year.