What is the significance of callase enzyme for a pollen grains?

Q. Callase enzyme which dissolves callose of pollen tetrads to separate four pollens is provided by.

Q. The exine of pollen grain is hard and resistance to enzyme action. Give reason.

Q. The exine of pollen grain is hard and resistant to enzyme action. Give reasons.

Q. Identify the pair of wrong statements.
I. Intine of pollen grains is made up of sporopollenin.
II. Pollen grains are well preserved as fossils because of the presence of sporopollenin.
III. Enzymes can degrade the organic material of the pollen grain exine.
IV. Sporopollenin can withstand high temperature, strong acids and alkali.

Q. Read the following statements and identify the wrong pair.

$i$. Intine of pollen grains is made up of sporopollenin
$ii$. Pollen grains are well preserved as fossils because of the presence of sporopollenin
$iii$. Enzymes can degrade the organic material of the pollen grain exine
$iv$. Sporopollenin can withstand high temperatures, strong acids and alkalis.