Double fertilization | free test 11 |standard 12|Sexual reproduction in flowering plants | NCERT| Biology

 Sexual reproduction in flowering plants (New syllabus chapter 1 / old syllabus Chapter 2)

Double Fertilization|reproduction in flowering plants|Free test| NCERT| standard 12| Biology

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Test 11

Double Fertilization

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Easy notes for - "double fertilization" of angiosperms

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(1) ________ is carried by pollen tube in flowering plants.

      A) 2 male gametes

      B) 2 female gametes

      C) 2 synergids

      D) both A) & C)

(2) Double fertilization is.....

       A) fusion of 2 male gametes of a pollen tube with 2 different eggs

       B) fusion of 1 male gamete with 2 polar nuclei

      C) fusion of 2 male gametes with 1 egg

      D) Syngamy and Triple fusion

(3) Double fertilization is exhibited by......

      A) Fungi

      B) Algae

      C) Angiosperms

      D) Gymnosperms

(4) Endosperm is formed through fertilization of....

      A) 2 polar nuclei and 1 male gamete

      B) 1 polar nucleus and 1 male gamete

      C) Ovum and male gametes

      D) 2 polar nuclei and 2 male gametes

(5) The entry of pollen tube into the embryo sac takes place due tk chemo-attractant secreted by......

      A) Tapetum

      B) Oosphere

      C) filiform apparatus

      D) antipodal

(6) After double fertilization, a mature ovule has:

      A) 1 diploid and 1 haploid cell

      B) 1 diploid and 1 triploid cell

      C)  2 haploid and 1 triploid cell

      D) 1 haploid and 1 triploid cell 

(7) In double fertilization, total number of male nuclei and total number of female nuclei involved are:

       A) 3, 2 respectively

       B) 2, 3 respectively

       C) 2, 2 respectively

       D) 3, 3 respectively 

(8) The central cell in the embryo sac, after triple fusion, becomes - 

        A) Primary Endosperm Cell

        B) Primary Endosperm Nucleus

        C) Endosperm

        D) Embryo 

(9) A pollen tube liberates male gametes into.......

       A) Degenerating synergids

       B) Intact Synergids

       C) Antipodal cells

       D) Egg

(10) Identify X, Y and Z in the below image.

           A) X: Primary Endosperm Cell

                Y: Degenerating antipodal cells

                Z: Degenerating synergids 

           B) X: Primary Endosperm Nucleus 

                Y: Degenerating antipodal cells

                Z: Primary Endosperm Cell

           C) X: Primary Endosperm Nucleus 

                Y: Degenerating antipodal cells

                Z: Degenerating synergids 

           D) X: Primary Endosperm Cell

                Y: Degenerating antipodal cells

                Z: Zygote 

We hope this test helped you with your knowledge. Also try to keep records  of time for solving these questions. This will help you doing faster solving.

Now check the answers of these questions from the below answer tally:

1- A, 2-D, 3-C, 4-A, 5-C, 6-B, 7-B, 8-A, 9-A, 10-C

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