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Plant Kingdom · Question 96

AIPMT 2003MCQMedium📈 Topic in 38% papers+4−1
1

Sexual reproduction in Spirogyra is an advanced feature because it shows

  1. different sizes of motile sex organs
  2. same size of motile sex organs
  3. morphologically different sex organs
  4. physiologically differentiated sex organs.

Answer

(4) physiologically differentiated sex organs.

Solution

In Spirogyra, sexual reproduction is by conjugation; the gametes are non-flagellated (non-motile) and similar in size and form.

⇒ One gamete (male, +) is active and moves through the conjugation tube, the other (female, −) is passive.

∴ The gametes are morphologically similar but physiologically differentiated (physiological anisogamy), which is the advanced feature.

Answer: (4)

AIPMT 2003

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2

Plants reproducing by spores such as mosses and ferns are grouped under the general term

  1. cryptogams
  2. bryophytes
  3. sporophytes
  4. thallophytes.
AIPMT 2003
3

Which one pair of examples will correctly represent the grouping spermatophyta according to one of the schemes of classifying plants?

  1. Acacia, sugarcane
  2. Pinus, Cycas
  3. Rhizopus, Triticum
  4. Ginkgo, Pisum
AIPMT 2003
4

Which one of the following is categorised under living fossils ?

  1. Cycas
  2. Metasequoia
  3. Pinus
  4. Selaginella
AIPMT 2003
5

Chlorenchyma is known to develop in the :

  1. Mycelium of a green mould such as Aspergillus
  2. Pollen tube of Pinus
  3. Cytoplasm of Chlorella
  4. Spore capsule of a moss
AIPMT 2003
6

Which of the following is without exception in angiosperms?

  1. Presence of vessels
  2. Double fertilisation
  3. Secondary growth
  4. Autotrophic nutrition
AIPMT 2002
7

Which of the following plants produces seeds but not flowers?

  1. Maize
  2. Mint
  3. Peepal
  4. Pinus
AIPMT 2002
8

Cycas has two cotyledons but not included in angiosperms because of

  1. naked ovules
  2. seems like monocot
  3. circinate ptyxis
  4. compound leaves
AIPMT 2001
9

A student observed an alga with chlorophyll a, d and phycoerythrin, it should belong to

  1. Phaeophyta
  2. Rhodophyta
  3. Chlorophyta
  4. Bacillariophyta
AIPMT 2000
10

In ferns, meiosis takes place at the time of

  1. spore formation
  2. spore germination
  3. gamete formation
  4. antheridia and archegonia formation
AIPMT 2000
11

Plant group with largest ovule, largest tree, and largest gametes is

  1. gymnosperm
  2. angiosperm
  3. bryophyta
  4. pteridophyta.
AIPMT 2000

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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
Other chaptersBiomolecules (Biology)