The process of differentiation of spermatid into a spermatozoa is known as :

• spermatogenesis
• gametogenesis
• spermiogenesis
• oogenesis

Primary spermatocyte produces 4 spermatozoa, but primary oocyte produces :

• 1 ovum
• 2 ova
• 3 ova
• 4 ova

Ovulation takes place :

• 2 weeks before the start of next menstrual cycle
• 14th day of 28 days cycle
• 10 days after the cease of previous monthly cycle
•  All the above are correct.

Which of the following shows hermaphroditism and self fertilization ?

• Earthworm
• Tapeworm
• Both A & B
• Rotifers.