Biological Classification


  1. System of classification used by Linnaeus was









  1. View Hint View Answer Discuss in Forum

    Linnaeus put forward an “Artificial system” of plant classification which was based on sexual characters. It is commonly also called as Sexual System of plant classification.

    Correct Option: B

    Linnaeus put forward an “Artificial system” of plant classification which was based on sexual characters. It is commonly also called as Sexual System of plant classification.


  1. Artificial system of classification was first used by\









  1. View Hint View Answer Discuss in Forum

    During the early period in taxonomy, only external morphology (the characters observable with naked eye) were the sole criteria to classify plants and animals. Theophrastus gave names and description of 480 plants in his book “Historia plantarum” , on the basis of their habit but Pliny the Edler introduced first artificial system of classification in his book Historia Naturalis. He classified both plants and animals.

    Correct Option: C

    During the early period in taxonomy, only external morphology (the characters observable with naked eye) were the sole criteria to classify plants and animals. Theophrastus gave names and description of 480 plants in his book “Historia plantarum” , on the basis of their habit but Pliny the Edler introduced first artificial system of classification in his book Historia Naturalis. He classified both plants and animals.



  1. Five kingdom system of classification suggested by R.H. Whittaker is not based on:









  1. View Hint View Answer Discuss in Forum

    Five kingdom system of classification was proposed by R.H. Whittaker (1969). The five kingdom classification is based on the following criteria:
    • Complexity of cell structure – Prokaryotes or Eukaryotes
    • Complexity of organisms body – Unicellular or Multicellular
    • Mode of obtaining nutrition – Autotrophic or Heterotrophic
    • Phylogenetic relationships

    Correct Option: A

    Five kingdom system of classification was proposed by R.H. Whittaker (1969). The five kingdom classification is based on the following criteria:
    • Complexity of cell structure – Prokaryotes or Eukaryotes
    • Complexity of organisms body – Unicellular or Multicellular
    • Mode of obtaining nutrition – Autotrophic or Heterotrophic
    • Phylogenetic relationships


  1. What is common about Trypanosoma, Noctiluca, Monocystis and Giardia?









  1. View Hint View Answer Discuss in Forum

    Trypanosoma, Noctiluca, Monocystis & Giardia are unicellular protists i.e. unicellular eukaryotes.

    Correct Option: D

    Trypanosoma, Noctiluca, Monocystis & Giardia are unicellular protists i.e. unicellular eukaryotes.



  1. In the five-kingdom system of classification, which single kingdom out of the following can include blue green algae, nitrogen-fixing bacteria and methanogenic archaebacteria?









  1. View Hint View Answer Discuss in Forum

    Monera is the prokaryotic kingdom that includes bacteria, blue green algae (cyanobacteria) and archae-bacteria (a group of ancient bacteria). Protista includes slime, unicellular and colonial eukaryotes. The important members are diatoms, dinoflagellates, euglenoids, moulds and protozoans. Fungi is the kingdom of multicellular or multinucleate heterophyllous and spore producing eukaryotic organisms like Rhizopus mildews, mushroom etc. Kingdom plantae includes all coloured multicellular photosynthetic organisms (plants).

    Correct Option: D

    Monera is the prokaryotic kingdom that includes bacteria, blue green algae (cyanobacteria) and archae-bacteria (a group of ancient bacteria). Protista includes slime, unicellular and colonial eukaryotes. The important members are diatoms, dinoflagellates, euglenoids, moulds and protozoans. Fungi is the kingdom of multicellular or multinucleate heterophyllous and spore producing eukaryotic organisms like Rhizopus mildews, mushroom etc. Kingdom plantae includes all coloured multicellular photosynthetic organisms (plants).