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The Living World · Question 24

AIPMT 2003MCQMedium📈 Topic in 0% papers+4−1
1

Biosystematics aims at

  1. the classification of organisms based on broad morphological characters
  2. delimiting various taxa of organisms and establishing their relationships
  3. the classification of organisms based on their evolutionary history and establishing their phylogeny on the totality of various parameters from all fields of studies
  4. identification and arrangement of organisms on the basis of their cytological characteristics.

Answer

(3) the classification of organisms based on their evolutionary history and establishing their phylogeny on the totality of various parameters from all fields of studies

Solution

As per NCERT, systematics deals with identification, nomenclature and classification of organisms, and takes into account their evolutionary relationships.

⇒ Biosystematics (modern systematics) uses data from all fields — morphology, anatomy, cytology, biochemistry, genetics, ecology — to work out the evolutionary history (phylogeny) of organisms.

∴ It classifies organisms on the basis of their evolutionary history using the totality of characters.

Answer: (3)

AIPMT 2003

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2

Nicotiana sylvestris flowers only during long days and N. tabacum flowers only during short days. If raised in the laboratory under different photoperiods, they can be induced to flower at the same time and can be cross-fertilized to produce self-fertile offspring. What is the best reason for considering N. sylvestris and N. tabacum to be separate species?

  1. They cannot interbreed in nature
  2. They are reproductively distinct
  3. They are physiologically distinct
  4. They are morphologically distinct
AIPMT 2003
3

What is true for individuals of same species ?

  1. Live in same habitat
  2. Live in different habitat
  3. Interbreeding
  4. Live in same niche
AIPMT 2002
4

Which of the following is less general in characters as compared to genus?

  1. Species
  2. Division
  3. Class
  4. Family
AIPMT 2001

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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)