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Sexual Reproduction in Flowering Plants · Question 29

NEET (UG) 2021MCQEasy📈 Topic in 50% papers+4−1
1

A typical angiosperm embryo sac at maturity is :

  1. 8-nucleate and 8-celled
  2. 8-nucleate and 7-celled
  3. 7-nucleate and 8-celled
  4. 7-nucleate and 7-celled

Answer

(2) 8-nucleate and 7-celled

Solution

As per NCERT, of the eight nuclei formed, six are surrounded by cell walls (3 at the micropylar end forming the egg apparatus and 3 at the chalazal end forming the antipodals), while the remaining two polar nuclei lie in the large central cell.

∴ Cells = 3 + 3 + 1 = 7 and nuclei = 8.

Thus a typical angiosperm embryo sac at maturity is 8-nucleate and 7-celled.

Answer: (2)

NEET (UG) 2021

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2

In some members of which of the following pairs of families, pollen grains retain their viability for months after release?

  1. Rosaceae : Leguminosae
  2. Poaceae : Rosaceae
  3. Poaceae : Leguminosae
  4. Poaceae : Solanaceae
NEET (UG) 2021
3

The body of the ovule is fused with the funicle at

  1. Chalaza
  2. Hilum
  3. Micropyle
  4. Nucellus
NEET (UG) 2020
4

The plant parts which consist of two generations - one within the other

  1. (i) and (iv)
  2. (i) only
  3. (i), (ii) and (iii)
  4. (iii) and (iv)
NEET (UG) 2020
5

In water hyacinth and water lily, pollination takes place by :

  1. Insects and water
  2. Water currents only
  3. Insects or wind
  4. Wind and water
Out of syllabusNEET (UG) 2020
6

Which one of the following statements regarding post-fertilization development in flowering plants is incorrect?

  1. Central cell develops into endosperm
  2. Ovules develop into embryo sac
  3. Ovary develops into fruit
  4. Zygote develops into embryo
NEET (UG) 2019
7

Persistent nucellus in the seed is known as

  1. Hilum
  2. Tegmen
  3. Chalaza
  4. Perisperm
NEET (UG) 2019
8

What is the fate of the male gametes discharged in the synergid?

  1. One fuses with the egg, other(s) fuse(s) with synergid nucleus.
  2. One fuses with the egg and other fuses with central cell nuclei.
  3. One fuses with the egg, other(s) degenerate(s) in the synergid.
  4. All fuse with the egg.
NEET (UG) 2019
9

Which of the following has proved helpful in preserving pollen as fossils?

  1. Pollenkitt
  2. Cellulosic intine
  3. Oil content
  4. Sporopollenin
NEET 2018
10

Winged pollen grains are present in

  1. Mustard
  2. Cycas
  3. Mango
  4. Pinus
NEET 2018
11

Double fertilization is

  1. fusion of two male gametes of a pollen tube with two different eggs
  2. fusion of one male gamete with two polar nuclei
  3. fusion of two male gametes with one egg
  4. syngamy and triple fusion
NEET 2018

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Class 11The Living WorldBiological ClassificationPlant KingdomMorphology of Flowering PlantsAnatomy of Flowering PlantsCell: The Unit of LifeCell Cycle and Cell DivisionTransport in PlantsMineral NutritionPhotosynthesis in Higher PlantsRespiration in PlantsPlant Growth and Development
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