Review the key concepts, formulae, and examples before starting your quiz.
🔑Concepts
The flower is the reproductive organ of a plant. The male part is the (stamens) and the female part is the (pistil/carpel).
Pollination is the process of transfer of from the to the of a flower.
Self-pollination occurs when pollen is transferred from the to the of the same flower or another flower on the same plant.
Cross-pollination involves the transfer of pollen from the of one flower to the of a flower on a different plant of the same species.
Agents of pollination include (Anemophily), (Hydrophily), and (Zoophily).
Fertilization is the fusion of the (found in the pollen tube) with the (egg cell) inside the .
After fertilization, the develops into the fruit and the develop into seeds.
The is the first cell of the new generation, formed by the union of male and female gametes.
📐Formulae
💡Examples
Problem 1:
A flower has very light, smooth, and dry pollen grains produced in large quantities. Identify the most likely agent of pollination.
Solution:
(Anemophily)
Explanation:
Plants that use wind for pollination produce light and non-sticky pollen so they can be easily carried by air currents. They do not need to attract insects with or bright colors.
Problem 2:
What happens to the , , and once fertilization is successfully completed?
Solution:
They usually and .
Explanation:
Once fertilization is achieved, the plant's energy is diverted to the development of the and . Therefore, non-essential parts like petals and stamens are no longer required and shed.
Problem 3:
Describe the path of the male gamete to reach the egg cell.
Solution:
.
Explanation:
Upon landing on a compatible , the pollen grain germinates to form a that carries the male gametes through the to reach the inside the .