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Sexual Reproduction in Flowering Plants · Question 113

AIPMT 2003MCQMedium📈 Topic in 50% papers+4−1
1

In a flowering plant, archesporium gives rise to

  1. only the wall of the sporangium
  2. both wall and the sporogenous cells
  3. wall and the tapetum
  4. only tapetum and sporogenous cells.

Answer

(2) both wall and the sporogenous cells

Solution

In a young anther, a group of hypodermal archesporial cells divides periclinally.

⇒ Outer cells → primary parietal layer, which forms the wall layers (endothecium, middle layers and tapetum).

⇒ Inner cells → primary sporogenous layer, which forms the sporogenous tissue (microspore mother cells).

∴ Archesporium gives rise to both the wall and the sporogenous cells.

Answer: (2)

AIPMT 2003

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2

In angiosperms pollen tubes liberate their male gametes into the

  1. central cell
  2. antipodal cells
  3. egg cell
  4. synergids
AIPMT 2002
3

In angiosperms all the four microspores of tetrad are covered by a layer which is formed by

  1. pectocellulose
  2. callose
  3. cellulose
  4. sporopollenin
AIPMT 2002
4

What is the direction of micropyle in anatropous ovule?

  1. Upwards
  2. Downward
  3. Right
  4. Left
AIPMT 2002
5

Adventive embryony in Citrus is due to

  1. nucellus
  2. integuments
  3. zygotic embryo
  4. fertilized egg.
AIPMT 2001
6

In grasses what happens in microspore mother cell for the formation of mature pollen grains?

  1. One meiotic and two mitotic divisions
  2. One meiotic and one mitotic divisions
  3. One meiotic division
  4. One mitotic division
AIPMT 2001
7

Anemophily type of pollination is found in

  1. Salvia
  2. bottle brush
  3. Vallisneria
  4. coconut.
AIPMT 2001
8

Hair found in the inflorescence of Zea mays are the modification of

  1. style
  2. stigma
  3. spathe
  4. filaments.
AIPMT 2000
9

Endosperm is formed during the double fertilization by

  1. two polar nuclei and one male gamete
  2. one polar nucleus and one male gamete
  3. ovum and male gamete
  4. two polar nuclei and two male gametes
AIPMT 2000
10

Eight nucleated embryo sac is

  1. only monosporic
  2. only bisporic
  3. only tetrasporic
  4. any of these.
AIPMT 2000

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