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Sexual Reproduction in Flowering Plants · Question 32

NEET (UG) 2020MCQMedium📈 Topic in 0% papers+4−1
1

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)

Answer

(1) (i) and (iv)

Solution

Two generations one within the other ⇒ a gametophyte (n) lying inside a sporophytic tissue (2n).

(i) Pollen grain (male gametophyte) inside the anther (part of the sporophyte) ⇒ two generations ✓

(ii) A germinated pollen grain with two male gametes is only the male gametophyte ⇒ one generation ✗

(iii) Seed inside the fruit: both seed coat/embryo and fruit wall belong to the sporophytic phase (with triploid endosperm) — not a gametophyte within a sporophyte ✗

(iv) Embryo sac (female gametophyte) inside the ovule (sporophytic nucellus and integuments) ⇒ two generations ✓

∴ (i) and (iv)

Answer: (1)

NEET (UG) 2020

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2

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
3

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
4

Persistent nucellus in the seed is known as

  1. Hilum
  2. Tegmen
  3. Chalaza
  4. Perisperm
NEET (UG) 2019
5

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
6

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

  1. Pollenkitt
  2. Cellulosic intine
  3. Oil content
  4. Sporopollenin
NEET 2018
7

Winged pollen grains are present in

  1. Mustard
  2. Cycas
  3. Mango
  4. Pinus
NEET 2018
8

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
9

Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other?

  1. Hydrilla
  2. Yucca
  3. Banana
  4. Viola
NEET 2018
10

Pollen grains can be stored for several years in liquid nitrogen having a temperature of

  1. -120 C
  2. -80 C
  3. -196 C
  4. -160 C
NEET 2018
11

The morphological nature of the edible part of coconut is

  1. cotyledon
  2. endosperm
  3. pericarp
  4. perisperm
NEET 2017

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All NEET Botany chapters
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
Class 12Reproduction in OrganismsSexual Reproduction in Flowering PlantsPrinciples of Inheritance and VariationMolecular Basis of InheritanceStrategies for Enhancement in Food ProductionMicrobes in Human WelfareOrganisms and PopulationsEcosystemBiodiversity and ConservationEnvironmental Issues
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