www.bbcnoun.com.ng BIO413 7/10 1. When does spermatogenesis start? at sexual maturity 2. The following are types of cleavage pattern except _____. latitudinal 3. Where does gastrulation begin in frogs? marginal zone 4. The following are constituents of the sperm except _____. A propulsion system 5. Which of the following steps is not involved in the interaction of sperm and egg? activation of the egg metabolism to start development 6.How many daughter cells are produced at the end of mitotic division? 2 7. Which of the following tissues is not a product of the mesoderm? pancreas 8. The following are calsess of egg based on the amount of yolk present except _____. centrolecithal 9. Which of the following enzymes checks the entry of more than one sperm into the ovum? catalase 10. Which of the following is not a primary egg membrane? chorion