PYQSide ExamsMy practice

Sexual Reproduction in Flowering Plants · Question 83

AIPMT 2012 (Mains)MCQMedium📈 Topic in 50% papers+4−1
1

Which one of the following statements is wrong?

  1. When pollen is shed at two-celled stage, double fertilization does not take place.
  2. Vegetative cell is larger than generative cell.
  3. Pollen grains in some plants remain viable for months.
  4. Intine is made up of cellulose and pectin.

Answer

(1) When pollen is shed at two-celled stage, double fertilization does not take place.

Solution

As per NCERT, in over 60 per cent of angiosperms pollen grains are shed at the 2-celled stage (vegetative cell + generative cell); the generative cell divides inside the pollen tube to form the two male gametes.

∴ Both male gametes are still delivered into the embryo sac and double fertilisation takes place normally ⇒ statement (1) is wrong.

(2) The vegetative cell is bigger, with abundant food reserve and a large irregular nucleus; the generative cell is small and floats in its cytoplasm — correct.

(3) Pollen of some members of Rosaceae, Leguminosae and Solanaceae remains viable for months — correct.

(4) The inner wall, intine, is a thin continuous layer made of cellulose and pectin — correct.

Answer: (1)

AIPMT 2012 (Mains)

Keep practising — Sexual Reproduction in Flowering Plants

2

Plants with ovaries having only one or a few ovules, are generally pollinated by

  1. bees
  2. butterflies
  3. birds
  4. wind
AIPMT 2012 (Mains)
3

Both, autogamy and geitonogamy are prevented in

  1. Papaya
  2. cucumber
  3. castor
  4. maize.
AIPMT 2012 (Prelims)
4

An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is

  1. cuticle
  2. sporopollenin
  3. lignin
  4. cellulose.
AIPMT 2012 (Prelims)
5

Even in absence of pollinating agents seed-setting is assured in

  1. Commelina
  2. Zostera
  3. Salvia
  4. fig.
AIPMT 2012 (Prelims)
6

In angiosperms, functional megaspore develops into

  1. embryo sac
  2. ovule
  3. endosperm
  4. pollen sac.
AIPMT 2011 (Mains)
7

What is common between vegetative reproduction and apomixis?

  1. Both are applicable to only dicot plants
  2. Both bypass the flowering phase
  3. Both occur round the year
  4. Both produce progeny identical to the parent.
AIPMT 2011 (Mains)
8

Filiform apparatus is a characteristic feature of

  1. suspensor
  2. egg
  3. synergid
  4. zygote.
AIPMT 2011 (Prelims)
9

Nucellar polyembryony is reported in species of

  1. Citrus
  2. Gossypium
  3. Triticum
  4. Brassica.
AIPMT 2011 (Prelims)
10

Which one of the following pollinations is autogamous?

  1. Geitonogamy
  2. Xenogamy
  3. Chasmogamy
  4. Cleistogamy
AIPMT 2011 (Prelims)
11

Wind pollination is common in

  1. legumes
  2. lilies
  3. grasses
  4. orchids.
AIPMT 2011 (Prelims)

All Sexual Reproduction in Flowering Plants PYQs →

PDFDownload Sexual Reproduction in Flowering Plants PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
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
Other chaptersBiomolecules (Biology)