Reproduction

Question 1

Why is it important for newborn babies to have antibodies?

Answer 1

• passive immunity
• protects against infections/diseases mother had
• immune system of babies are not developed

Question 2

How is a sperm cell adapted to its function?

Answer 2

• flagellum for movement
• streamlined shape for efficient swimming
• mitochondria for energy
• nucleus to transfer genetic info
• haploid nucleus to fuse with egg nucleus

Question 3

Advantages of sexual reproduction

Answer 3

• allows variation
• ability to express recessive traits
• allows natural selection/evolution
• random fusion of gametes
• adaptation
• maintain/increase population

Question 4

Advantages of breast-feeding:

Answer 4

• bonding between mother and foetus
• has complete set of required nutrients
• sterile
• supplied at body temp.
• no preparation required
• reduces risk of allergies
• easier to digest