Chose the correct answer form alternatives provided.

a) Fertilization is responsible for the activation/arrest of development.

b) Activation of the sperm ensures/does not ensure that sperm will meet the egg.

c) In organisms with external/internal fertilization, chemotactic mechanisms have been evolved to attract the sperm towards the egg.

d) A period of maturation in the female reproductive tract required for the transformation of sperm is known as activation/capactiation.

e) Sperm using an enzyme called acrosin/hyaluronidase penetrate their way through zona pellucida.

Types of mammalian uteri

How do bats prevent getting deaf from their high frequency calls? How do they get information about the immediate environment?

What is the function of amniotic fluid? How are substances exchanged between the embryonic and maternal blood?

Give five features that you can use to distinguish between the skulls of frog and rabbit.

Match the following:

Describe the specializations found in ruminant stomachs.