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Plant Kingdom · Question 29

NEET 2018MCQMedium📈 Topic in 62% papers+4−1
1

Which of the following statements is correct?

  1. Selaginella is heterosporous, while Salvinia is homosporous.
  2. Stems are usually unbranched in both Cycas and Cedrus
  3. Ovules are not enclosed by ovary wall in gymnosperms
  4. Horsetails are gymnosperms

Answer

(3) Ovules are not enclosed by ovary wall in gymnosperms

Solution

As per NCERT, gymnosperms (gymnos: naked, sperma: seeds) are plants in which the ovules are not enclosed by any ovary wall and remain exposed before and after fertilisation ⇒ (3) is correct.

Both Selaginella and Salvinia are heterosporous ⇒ (1) is incorrect.

Stems are unbranched in Cycas but branched in Pinus and Cedrus ⇒ (2) is incorrect.

Horsetails ( Equisetum) are pteridophytes ⇒ (4) is incorrect.

Answer: (3)

NEET 2018

Keep practising — Plant Kingdom

2

Which one is wrongly matched?

  1. Biflagellate zoospores – Brown algae
  2. Uniflagellate gametes – Polysiphonia
  3. Unicellular organism – Chlorella
  4. Gemma cups – Marchantia
NEET 2018
3

An example of colonial alga is

  1. Volvox
  2. Ulothrix
  3. Spirogyra
  4. Chlorella
NEET 2017
4

Select the mismatch

  1. Cycas – Dioecious
  2. Salvinia – Heterosporous
  3. Equisetum – Homosporous
  4. Pinus – Dioecious
NEET 2017
5

Zygotic meiosis is characteristic of

  1. Fucus
  2. Funaria
  3. Chlamydomonas
  4. Marchantia
NEET 2017
6

Life cycles of Ectocarpus and Fucus respectively are

  1. diplontic, haplodiplontic
  2. haplodiplontic, diplontic
  3. haplodiplontic, haplontic
  4. haplontic, diplontic
NEET 2017
7

Select the correct statement

  1. Sequoia is one of the tallest trees.
  2. The leaves of gymnosperms are not well adapted to extremes of climate.
  3. Gymnosperms are both homosporous and heterosporous.
  4. Salvinia, Ginkgo and Pinus all are gymnosperms.
NEET 2016 (Phase 1)
8

In bryophytes and pteridophytes, transport of male gametes requires

  1. birds
  2. water
  3. wind
  4. insects.
NEET 2016 (Phase 1)
9

Conifers are adapted to tolerate extreme environmental conditions because of

  1. broad hardy leaves
  2. superficial stomata
  3. thick cuticle
  4. presence of vessels.
NEET 2016 (Phase 2)
10

Which one of the following statements is wrong?

  1. Algae increase the level of dissolved oxygen in the immediate environment.
  2. Algin is obtained from red algae, and carrageenan from brown algae.
  3. Agar-agar is obtained from Gelidium and Gracilaria.
  4. Laminaria and Sargassum are used as food.
NEET 2016 (Phase 2)
11

Which one of the following statements is wrong?

  1. Chlorella and Spirulina are used as space food.
  2. Mannitol is stored food in Rhodophyceae.
  3. Algin and carrageenan are products of algae.
  4. Agar-agar is obtained from Gelidium and Gracilaria.
AIPMT 2015 (Cancelled)

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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)