Difference between potential pollen and pollen grain.

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Solution

Potential Pollen Grain Pollen Grain

Potential pollen grain is formed from the sporogenous tissue present at the centre of the micro sporangium. It is also called pollen mother cell .This potential pollen grain has the capability to form four Micro spores. The micro spores formed during Microsporogenesis detach from each other when the anther matures and develop into pollen grains.

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Question 15
Length of pollen tube depends on the distance between

(a) pollen grain and upper surface of stigma
(b) pollen grain on upper surface of stigma and ovule
(c) pollen grain in anther and upper surface of stigma
(d) upper surface of stigma and lower part of style

Regarding assertion and reason, select the right option.

Assertion (A): Pollen grains have a tough outer covering.
Reason (R): Pollen grains differs in size, shape, colour and design.

Q. Classify the given statements under the headings 'self pollination ' and 'cross pollination'.
a. Transfer of pollen grains from the anther to the stigma of the same flower.
b. Transfer of pollen grains from the anther to the stigma of a different flower.
c. No need of pollinators to transfer pollen grains.
d. Produces large amounts of pollen grains.
e. Requires pollinators to transfer pollen grains.

Q. The pollen grains of __________ cause pollen allergy.

Q. Which part of pollen grain produces pollen tube

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Potential Pollen Grain	Pollen Grain
Potential pollen grain is formed from the sporogenous tissue present at the centre of the micro sporangium. It is also called pollen mother cell .This potential pollen grain has the capability to form four Micro spores.	The micro spores formed during Microsporogenesis detach from each other when the anther matures and develop into pollen grains.