In angiosperms, microsporogenesis and mega sporogenesis

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1.Sexual Reproduction in Flowering Plants

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In angiosperms, microsporogenesis and mega sporogenesis

A

involve meiosis

B

occur in ovule

C

occur in anther

D

form gametes without further divisions.

(NEET-2015)

Solution

(a) : In angiosperms, microsporogenesis i.e., formation of microspores (or pollen grains) occurs by the meiotic divisions of diploid microspore mother cells (or pollen mother cells). Microsporogenesis takes place in the anther. Megasporogenesis $i.e.$ formation of megaspores occurs by the meiotic divisions of diploid megaspore mother cells. Megasporogenesis takes place in the ovule.

Standard 12

Biology

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Similar Questions

Choose correct sentence.

$(I)$ Nucleus of the functional megaspore divides meiotically to form two nuclei.

$(II)$ After $8$ nucleate stage, cell walls are laid down leading to organization of typical female gametophyte

$(III)$ The egg apparatus, consists of two synergids and one egg cell.

$(IV)$ Three cells are at the chalaza end are called antipodal cells.

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An angiospermic plant is having $24$ chromosomes in its leaf cells. The number of chromosomes present in synergid, pollen grain, nucellus & endosperm will be respectively

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The ovule in which the funicle, chalaza and micropyle lie in one vertical plane, is called

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The normal or Polygonum type of embryo sac is

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Definations / Explanation :

$1.$ Micropyle

$2.$ Chalaza

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