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Development of Male Gametophyte

The inner lay...

Question

The inner layer of the cell wall surrounding the pollen grains of angiosperms and gymnosperms is known as

A

Integument

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B

Intine

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C

Exine

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D

Involucre

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Solution

The correct option is B Intine
The inner wall of the pollen grain is called the intine . It is thin and continuous layer made up of cellulose and pectin. So, the correct answer is "Intine."

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Q. Choose the correct statement(s) regarding pollen grains.
I. Pollen grains are the male gametes of the flowering plant.
II. Pollen grain has a prominent two-layered wall.
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Q. Consider the following statements.
(i) Polyspermy may bring about fertilisation of egg by more than one male nucleus or the supernumerary sperms may fertilise other components of embryo sac such as synergids or antipodals.
(ii) In angiosperms, pollen tube is normally an unbranched structure which usually persists after fertilisation.
(iii) Intine is the inner, pectocellulosic layer of pollen grain wall which is destroyed during acetolysis.
(iv) Exine layer of pollen grain comprises of an outer non-sculptured layer sexine and an inner sculptured layer tectum.
Which of the following combinations of given statements is correct?

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