PYQSide ExamsMy practice

Sexual Reproduction in Flowering Plants · Question 99

AIPMT 2008MCQEasy📈 Topic in 12% papers+4−1
1

What does the filiform apparatus do at the entrance into ovule?

  1. It brings about opening of the pollen tube.
  2. It guides pollen tube from a synergid to egg.
  3. It helps in the entry of pollen tube into a synergid.
  4. It prevents entry of more than one pollen tube into the embryo sac.

Answer

(3) It helps in the entry of pollen tube into a synergid.

Solution

As per NCERT, the synergids have special cellular thickenings at the micropylar tip called filiform apparatus, which play an important role in guiding the pollen tubes into the synergid.

⇒ The pollen tube enters the ovule through the micropyle and then enters one of the synergids through the filiform apparatus.

⇒ Inside the synergid the pollen tube releases the two male gametes; the movement of a male gamete to the egg is not guided by the filiform apparatus.

∴ The filiform apparatus helps in the entry of the pollen tube into a synergid.

Answer: (3)

AIPMT 2008

Keep practising — Sexual Reproduction in Flowering Plants

2

Unisexuality of flowers prevents

  1. geitonogamy, but not xenogamy
  2. autogamy and geitonogamy
  3. autogamy, but not geitonogamy
  4. both geitonogamy and xenogamy
AIPMT 2008
3

Which one of the following is resistant to enzyme action?

  1. Pollen exine
  2. Leaf cuticle
  3. Cork
  4. Wood fibre
AIPMT 2008
4

Male gametes in angiosperms are formed by the division of

  1. generative cell
  2. vegetative cell
  3. microspore mother cell
  4. microspore
AIPMT 2007
5

Which one of the following is surrounded by a callose wall?

  1. Male gamete
  2. Egg
  3. Pollen grain
  4. Microspore mother cell
AIPMT 2007
6

Long filamentous threads protruding at the end of a young cob of maize are

  1. hairs
  2. anthers
  3. styles
  4. ovaries
AIPMT 2006
7

In a cereal grain the single cotyledon of embryo is represented by

  1. coleoptile
  2. coleorhiza
  3. scutellum
  4. prophyll.
AIPMT 2006
8

The arrangement of the nuclei in a normal embryo sac in the dicot plants is

  1. 3 + 3 + 2
  2. 2 + 4 + 2
  3. 3 + 2 + 3
  4. 2 + 3 + 3
AIPMT 2006
9

In a type of apomixis known as adventive embryony, embryos develop directly from the

  1. nucellus or integuments
  2. zygote
  3. synergids or antipodals in an embryo sac
  4. accessory embryo sacs in the ovule.
AIPMT 2005
10

Which one of the following represents an ovule, where the embryo sac becomes horse-shoe shaped and the funiculus and micropyle are close to each other?

  1. Amphitropous
  2. Circinotropous
  3. Atropous
  4. Anatropous
AIPMT 2005
11

Through which cell of the embryo sac, does the pollen tube enter the embryo sac?

  1. Egg cell
  2. Persistent synergid
  3. Degenerated synergids
  4. Central cell
AIPMT 2005

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)