What words will correct fill (a) , (b),(...

What words will correct fill (a) , (b),(c) and (d) in the following paragraph ?
(a) developed into a pollen grain. The outer layer is (b) and inner layer is intine . The inner layer is made up to cellulose and ( c) .In 60% of the angiosperms, pollen grains are shed at (d) celled stage .

(a) - Anther , (b) - Exine , (c) - Chitin , (d) - 3

(a) - Microspore , (b) - Exine , (c) - Chitin (d) -2

(a) - Anther , (b) - Exine , (c) - Pectin , (d) - 2

(a) - Microspore , (b) - Exine , (c) - pectin, (d) -2

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In over 40% of angiosperms, pollen grains are shed at 3 celled stage, these 3 cells are :

The innermost layer of anther wall whose cells nourish the developing pollen grains is

Read the following four statements ( A -D ): (i) The outer wall of the pollen grain is pecto - cellulosic in nature. (ii) In pollen grain, the generative cell is bigger and contains abundant food reserve. (iii) In all angiosperm , pollen grains are always shed at the 2-celled stage. (iv) Usually , sporogenous cell directly behaves as the megaspore mother cell. How many of the above statements are wrong ?

A. The pollen grain is generally spherical measuring about 25 - 50 cm in diameter. B. In over 60% of angiosperms , pollen grains are shed at 2 celled stage. Select the statement that holds true for the above statement .

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Zygospore of Spirogyra is (a) Multilayered (b) Three layered (c) Two layered (d) One layered

The cell wall of Spirogyra is made up of (a) Cellulose (b) Suberin (c) Lignin (d) Chitin

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Assertion :- Pollen grains can withstand high temperature and strong acids and alkali. Reason-Their inner layer intine is made up of sporopollenin

60 % of the angiosperms shed their pollens at the (a) 2 celled stage (b) 3 celled stage (c) 4 celled stage (d) 1 celled stage

What words will correct fill (a) , (b),(c) and (d) in the following paragraph ? (a) developed into a pollen grain. The outer layer is (b) and inner layer is intine . The inner layer is made up to cellulose and ( c) .In 60% of the angiosperms, pollen grains are shed at (d) celled stage .

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What words will correct fill (a) , (b),(c) and (d) in the following paragraph ?
(a) developed into a pollen grain. The outer layer is (b) and inner layer is intine . The inner layer is made up to cellulose and ( c) .In 60% of the angiosperms, pollen grains are shed at (d) celled stage .