Biology Practice: Pollination & Fertilization (Mock Test 3 - Advanced: Processes, Mechanisms & Why/How)
1. Why is "Cross-Pollination" generally considered more advantageous than "Self-Pollination"?
2. How does the process of "Double Fertilization" lead to the formation of two distinct structures?
3. What is the biological mechanism behind "Self-Incompatibility" (Self-Sterility)?
4. Why must "Triple Fusion" occur for the successful development of a seed?
5. How do "Cleistogamous" flowers ensure seed set even in environmental isolation?
6. What is the role of "Chemotropism" in the process of fertilization?
7. Why is "Anemophily" (Wind pollination) associated with the production of enormous quantities of pollen?
8. What mechanism prevents the fertilization of an egg by more than one pollen grain (Polyspermy)?
9. How does "Dichogamy" (Protandry/Protogyny) act as a barrier to self-pollination?
10. Why do the "Antipodal cells" and "Synergids" eventually degenerate after fertilization?
11. What is the process of "Germination of Pollen Grain" triggered by?
12. Why is "Hydrophily" restricted to only a few genera of aquatic plants?
13. In "Double Fertilization," the second fusion involves $n + n + n$ nuclei. This process is called:
14. How does "Entomophily" (Insect pollination) benefit from the "Pollen-basket" on a bee's leg?
15. Why do "Ornithophilous" (Bird-pollinated) flowers often lack a strong scent?
16. What is the difference between "Porogamy" and "Chalazogamy"?
17. How does "Xenogamy" promote the 'Survival of the Fittest'?
18. Why is the "Pollen Sac" (Anther) wall designed to burst (dehisce) at maturity?
19. In "Artificial Pollination", why is "Bagging" a critical step?
20. What is the fundamental difference between a "Zygote" and the "Primary Endosperm Nucleus ($PEN$)"?
