7.1 Investigating variation

Question 1

What does interspecific variation mean?

Answer 1

If one species differs from another.

Question 2

What does intraspecific variation mean?

Answer 2

If members of the same species differ from one another.

Question 3

What does sampling involve?

Answer 3

Taking measurements of individuals, selected from the population of organisms which are being investigated.

Question 4

Two reasons why sampling may not be representative?

Answer 4

• Sampling bias.- may be deliberately recording bias results or not deliberately.
• Chance. Individuals my be not representative by chance.

Question 5

What is the best way to eliminate bias sampling?

Answer 5

Eliminate any human involvement when choosing samples. RANDOM SAMPLING.

Question 6

What is the best way to avoid chance from sampling?

Answer 6

• Using a large sample size.

- Analysis of the data collected.

Question 7

Variation is the result of which two factors?

Answer 7

Genetic differences and environmental influences.

Question 8

Genetic differences is due to which three things?

Answer 8

• Mutations.
• Meiosis.
• Fusion of gametes.

Question 9

Four environmental influences include (for plants)?

Answer 9

Climatic conditions, PH, food availability and soil conditions.