y7 animal reproduction

• fertilisation- when a male and female sex sell meet and fuse together to make a fertilised egg cell
• two animals are needed for reproduction (1 male and 1 female)
• external fertilisation = more offspring
• internal fertilisation = less offspring
• mrs gren = movement, respiration, sensitivity, growth, reproduction, excretion, nutrition
• adaptations of a sperm cell- streamlined shape,acrozome - a chemical to break the outer layer of an egg cell, mitochondria to release energy, tail to swim to the egg