Biological Classification

Biological Classification

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Advanced Botany

Plant Growth and Development
Organisms and Populations
Ecosystem
Biodiversity and Conservation
Environmental Issues
Microbes in Human Welfare
Strategies for Enhancement in Food Production
Molecular Basis of Inheritance
Principles of Inheritance and Variation
Sexual Reproduction in Flowering Plants
Reproduction in Organisms
The Living World
Respiration in Plants
Photosynthesis
Mineral Nutrition
Transport in Plants
Cell Cycle and Cell Division
Cell-The Unit of Life
Anatomy of Flowering Plants
Morphology of Flowering Plants
Plant Kingdom
Biological Classification
  1. Which of the following are found in extreme saline conditions?








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    Archaebacteria are able to survive in harsh conditions due to the presence of branched lipid chain in cell membrane that reduces fluidity of cell membrane. It includes halophiles which are exclusively found in saline habitats.

    Correct Option: D

    Archaebacteria are able to survive in harsh conditions due to the presence of branched lipid chain in cell membrane that reduces fluidity of cell membrane. It includes halophiles which are exclusively found in saline habitats.

  1. Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen?








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    Mycoplasmas are smallest, prokaryotes lacking cell wall and are pleomorphic in nature. These are pathogenic to both plants and animals.

    Correct Option: B

    Mycoplasmas are smallest, prokaryotes lacking cell wall and are pleomorphic in nature. These are pathogenic to both plants and animals.

  1. The structures that help some bacteria to attach to rocks and/ or host tissues are:








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    Fimbriae assist some bacteria in attaching to rocks or host body for obtaining establishment and nutrition.

    Correct Option: A

    Fimbriae assist some bacteria in attaching to rocks or host body for obtaining establishment and nutrition.

  1. The motile bacteria are able to move by:








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    Motile bacteria have thin filamentous extensions on their cell wall called flagella.

    Correct Option: B

    Motile bacteria have thin filamentous extensions on their cell wall called flagella.

  1. Thermococcus, Methanococcus and Methanobacterium exemplify:








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    Thermococcus, Methanococcus and Methanobacterium exemplify archaebacteria that contain protein homologous to eukaryotic core histones.

    Correct Option: A

    Thermococcus, Methanococcus and Methanobacterium exemplify archaebacteria that contain protein homologous to eukaryotic core histones.