The Living World

Q1. If the diploid number of a flowering plant is 36. What would be the chromosomes number in its
endosperm?

  1. 18
  2. 54
  3. 72
  4. 36
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Ans: 2. 54

Q2. Polemoniales is tbe order which includes plant famllies Solanaceae and:

  1. Brrssicrceae.
  2. Fabrceae.
  3. Convolvulaceae.
  4. Lilliaceae.
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Ans: 3. Convolvulaceae.

Q3. Glycogen is a polymer of:

  1. Galactose.
  2. Glucose.
  3. Fructose.
  4. Sucrose.
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Ans: 2. Glucose.

Q4. Choose correct scientific name of mango:

  1. Mangifera indica Hook.
  2. Mangifera indica L.
  3. Mangifera Indica.
  4. Mangifera indica Linn.
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Ans: 4. Mangifera indica Linn.

Q5. Which of the following shows maximum diversity?

  1. Plantas.
  2. Animalia.
  3. Monerans.
  4. Protistans.
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Ans: 2. Animalia.

Q6. First life on earth was:

  1. Cyanobacteria.
  2. Chemoheterotrophs.
  3. Autotrophs.
  4. Photoautotrophs.
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Ans: 2. Chemoheterotrophs.

Q7. Botanical gardens and zoological parks have:

  1. Collection of endemic living species only.
  2. Collection of exotic living species only.
  3. Collection of endemic and exotic living species.
  4. Collection of only local plants and animals.
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Ans: 3. Collection of endemic and exotic living species.
Explanation:
To understand this, you can visit the zoo at Delhi or Kolkata. You can also search in Google image and you will find giraffes; along with
tigers and lions. Tigers and lions are endemic species while giraffe is an exotic species.

Q8. Kingdom pantea includes all multicellular eukaryotic, photosynthetic, organism. In traditional plant
kingdom divided in two subgroup one is cryptogam, choose the another one:

  1. Phanerogamae.
  2. Cryptogamae ii.
  3. Custogamae.
  4. Chemotogmae.
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Ans: 1. Phanerogamae

Q9. The ozone layer is found in the:

  1. Hydrosphere.
  2. Stratosphere.
  3. Lithosphere.
  4. Troposphere.
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Ans: 2. Stratosphere.

Q10. Study of fossils is:

  1. Palaeontology.
  2. Herpetology.
  3. Saurology.
  4. Organic evolution.
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Ans: 1. Palaeontology.

Q11. Which of the following does not come under taxon?

  1. Species.
  2. Kingdom.
  3. Division.
  4. Key.
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Ans: 4. Key.

Explanation:
Taxon is a group of one or more population of organisms. Kingdom, division and species come under taxon, but key is taxonomical aid.

Q12. The main objective of plant taxonomy is:

  1. To provide Latin ‘scientific’ names for every group of plants in the world.
  2. To provide a method for identification and nomenclature.
  3. To study the world’s flora.
  4. All of these.
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Ans: 4. All of these.

Q13. Which one of the following aspects is an exclusive characteristic of living things?

  1. Increase in mass by accumulation of material both on surface as well as internally.
  2. Isolated metabolic reactions occur in vitro.
  3. Increase in mass from inside only.
  4. Perception of events happening in the environment and their memory.
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Ans: 3. Increase in mass from inside only.

Q14. Two taxonomic species are distinguished from each other by:

  1. Their failure to interbreed.
  2. Their ability to exchange gene freely.
  3. Their similarity in morphological characters.
  4. Discontinuity in a set of correlated characters.
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Ans: 1. Their failure to interbreed.
Explanation:
Two taxonomic species are distinguished from each other by their failure to interbreed.

Q15. Keystone species are:

  1. Important for ecosystem.
  2. Important for plants.
  3. Endangered species.
  4. Extinct species.
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Ans: 1. Important for ecosystem.

Explanation:

Keystone species are plants or animals species that play a unique and crucial role in the way an ecosystem functions. They are very
important for ecosystem to function properly.

Q16. Employment of hereditary principles in the improvement of human race is:

  1. Euthenics.
  2. Eugenics.
  3. Euphenics.
  4. Ethnology.
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Ans: 2. Eugenics.

Q17. According to Oparin, which one of the following was not present in the primitive atmosphere of the
earth?

  1. Methane.
  2. Oxygen.
  3. Hydrogen.
  4. Water vapour.
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Ans: 2. Oxygen.

Q18. The ascending or descending arrangement of taxonomic categories is called as:

  1. Classification.
  2. Taxonomy.
  3. Hierarchy.
  4. Key.
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Ans: 3. Hierarchy.

Q19. Taxonomic studies depends on:

  1. Ecological information of organisms.
  2. Structure of cell and development process of organisms.
  3. External and internal structure of organisms.
  4. All of the above.
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Ans: 4. All of the above.
.

Explanation:
Taxonomic studies depends on ecological information of organisms, structure of cell and development process of organism and
external and internal structure of organisms.

Q20. Systematics deals with:

  1. Nomenclature of new organisms.
  2. Evolutionary relationship between organisms.
  3. Identification of newly discovered organisms.
  4. All of these.
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Ans: 4. All of these.

Explanation:
Linnaeus used System Naturae as the title of his publication. The scope of systematics includes identification, nomenclature and
classification. Systematics takes into account evolutionary relationship between organisms.

Q21. Species are considered as:

  1. Artificial concept of human mind which cannot be defined in absolute terms.
  2. The lowest units of classification.
  3. Real units of classification devised by taxonomists.
  4. Real basic units of classification.
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Ans: 2. The lowest units of classification.

Q22. Gammae are multicellular green structure for vegetative propagation. There are found inside Gemma
cups in:

  1. Marchantia thallus.
  2. Funaria protanema.
  3. Riccia capsule.
  4. Fern prothallu.
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Ans: 1. Marchantia thallus.

Q23. The most important feature of all living systems is to:

  1. Utilize oxygen to generate energy.
  2. Replicate the genetic information.
  3. Produce gametes.
  4. Utilize solar energy for metabolic activities.
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Ans: 2. Replicate the genetic information.

Q24. Which among the following is not associated with a sexual reproduction?

  1. Gamete formatlon.
  2. Fragmentation.
  3. Spore formation.
  4. Budding.
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Ans: 1. Gamete formatlon.

Q25. If there was no CO in the earth’s atmosphere the temperature of earth’s surface would be:

  1. Higher than the present.
  2. Less than the present.
  3. The same.
  4. Dependent on the amount of oxygen in the atmosphere.
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Ans: 2. Less than the present.

Q26. Which of the following is a defining characteristic of living organisms?

  1. Growth.
  2. Ability to make sound.
  3. Reproduction.
  4. Response to external stimuli.
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Ans: 4. Response to external stimuli.
Explanation:
Rest of the characters may not be apparent at every instance of time. But response to external stimuli can always be confirmed as and
when required. So, this is considered as a defining characteristic of living organisms.

Q27. The term ‘systematics’ refers to:

  1. Identification and study of organ systems of plants and animals.
  2. Identification and preservation of plants and animals.
  3. Diversity of kinds of organisms and their relationship.
  4. Study of habitats of organisms and their classification.
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Ans: 3. Diversity of kinds of organisms and their relationship.

Explanation:
In fact, the need for a proper classification system was felt because of huge diversity of organisms. Based on certain relationships,
organisms were classified into different group and sub-groups.

Q28. Adenine is:

  1. Purine.
  2. Pyrimidine.
  3. Nucleoside.
  4. Nucleotide.
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Ans: 1. Purine.

Q29. System of classification that employs numerical data to evaluate similarities and differences is known
as:

  1. Chemotaxonomy.
  2. Cytotaxonomy.
  3. Biosystematics.
  4. Phenetics.
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Ans: 4. Phenetics.

Q30. Biological organization starts with:

  1. Submicroscopic molecular level.
  2. Cellular level.
  3. Organismic level.
  4. Atomic level.
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Ans: 4. Atomic level.