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Sexual Reproduction in Flowering Plants · Question 114

AIPMT 2002MCQEasy📈 Topic in 12% papers+4−1
1

In angiosperms pollen tubes liberate their male gametes into the

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

Answer

(4) synergids

Solution

As per NCERT, after entering one of the synergids through the filiform apparatus, the pollen tube releases the two male gametes into the cytoplasm of the synergid.

⇒ One male gamete then fuses with the egg cell (syngamy) and the other with the two polar nuclei (triple fusion).

∴ Male gametes are liberated into the synergids.

Answer: (4)

AIPMT 2002

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2

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
3

What is the direction of micropyle in anatropous ovule?

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

Adventive embryony in Citrus is due to

  1. nucellus
  2. integuments
  3. zygotic embryo
  4. fertilized egg.
AIPMT 2001
5

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
6

Anemophily type of pollination is found in

  1. Salvia
  2. bottle brush
  3. Vallisneria
  4. coconut.
AIPMT 2001
7

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

  1. style
  2. stigma
  3. spathe
  4. filaments.
AIPMT 2000
8

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
9

Eight nucleated embryo sac is

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

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