Sexual + Asexual Reproduction

Question 1

Asexual reproduction

Answer 1

The ability to produce new offspring without having to find a mate.

Question 2

Advantages of asexual reproduction - (3 eg)

Answer 2

Organisms can quickly colonise an area
Fast process
Requires little energy

Question 3

Disadvantages of asexual reproduction - (3 eg)

Answer 3

• All offspring are identical to the parent
• If conditions change, the population lacks genetic variation
• Pressure on availabilty of resources
• Population more prone to diseases and deaths

Question 4

External fertilisation

Answer 4

Animals release their gametes into the external environment. Fertilisation occurs outside the organism’s body.

Question 5

Advantage of external fertilisation - (1 eg)

Answer 5

Large number of gametes produced, increase chance of fertilisation

Question 6

Disadvantage of external fertilisation - (1 eg)

Answer 6

Limited to aquatic or watery environments

Question 7

Internal fertilisation

Answer 7

Animals who deliever gametes directly into the reproductive tract. The fertilisation occurs in the body.

Question 8

Advantage of internal fertilisation - (1 eg)

Answer 8

Increase chances of gametes meeting
Occurs in all terrestrial organisms and some aquatic animals

Question 9

Advantages of sexual reproduction - (3 eg)

Answer 9

• Genetic diversity
• Variation increases survival chances
• Population more resilient to changes in environment

Question 10

Disadvantages of sexual reproduction - (3 eg)

Answer 10

• Slow process
• Requires lots of energy
• 1 to few offpsring at a time
• Some organsims can be killed during the process, due to competition for mate