Question

a) What is meant by pollination ? Name the two types of pollination.
b) What is a flower ? Draw a typical flower and label its different parts.

Answer 1

a) Pollination is the primary mode of sexual reproduction in flowering plants and is an important phenomenon in the life cycle of these plants.

Two types of pollination are-

• SELF-POLLINATION- It is the transfer of pollen grains from anthers to the stigma of a same or different but genetically similar flower.
• CROSS POLLINATION- It is the transfer of pollen grains from the anthers of one flower to the stigma of a genetically dissimilar flower of the same species.

b)

The part of the plant, which is colourful and acts as a reproductive part, located above a flattened structure called the thalamus, and consisting of four whorls is termed as a ‘flower’.

The four whorls of a flower:

• Pedicel: The stalk of the flower connecting it to the plant.
• Sepals: The green part of the flower that covers the bud and is connected to the stalk of the flower.
• Carpel: It is the female reproductive part.
• Stamen: It is the male reproductive part.
• Petals: The colored petals attract pollinators.
• Thalamus: The consists of the thick fleshy part at the base of the flower.