What words will correct fill a , b , c, and d in the following paragraph? a develops into a pollen grain. The outer layer is b and inner layer is intine. The inner layer is made up of cellulose and c

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

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The microspore develops into a pollen grain. The outer layer is exine. The inner layer is called intine and it is made up of cellulose and pectin. In 60% angiosperms, pollen grains shed at 2 - celled stage. In others, they are shed at 3 celled stages as the generative cell divides mitotically to form 2 male gametes.

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