Question

intine is the outer wall of pollen grains reason
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Answer 1

Answer:

The outer pollen wall, which prevents the pollen grain from shrinking and crushing the genetic material during desiccation, is composed of two layers. These two layers are the tectum and the foot layer, which is just above the intine. ... The outer wall is constructed with a resistant biopolymer called sporopollenin.

Answer 2

Answer:

the most striking feature of the pollen grain is the tough , resistant outer coat termed the exine which is often elaborated sculptured . Beneath the exine which is defined by the presence of one or two basal nexine layers ,a second major walk surrounds the pollen grain protoplasm termed as intone.