Kingdoms Plantae & Animalia : 12th Class Biology Question Answer Lesson 3 – NIOS

Kingdoms Plantae & Animalia : 12th Class Biology Question Answer Lesson 3 – NIOS

Kingdoms Plantae & Animalia : 12th Class Biology Question Answer Lesson 3 - NIOS


  1. Mention one unique feature of bryophytes.
    Ans. They complete their life cycle in water and land.
  2. Define alternation of generations.
    Ans. Alternation of gametophytic phase with sporophytic phase.
  3. Name the male and female sex organs of bryophytes.
    Ans. Antheridia and Archegonia
  4. List the habitat most suitable for the growth of bryophytes.
    Ans. Cool and humid place


  1. Name the dominant generation of pteridophytes – Sporophytic
  2. The stage of pteridophytes which produces spores for continuing rest of the lifecycle is – Sporophyte
  3. Why do you classify pteridophytes under Trachaeophyta – They have vascular tissues
  4. Name the male and female reproductive organs in pteridophytes ? – Antheridia and Archegonia
  5. Write the name of gametophyte of fern – Prothallus


  1. What does the term gymnosperm mean?
    Ans. Naked seeds
  2. Give any two common examples of gymnosperms.
    Ans. Cycas and Pinus
  3. List two commercial products of gymnosperms.
    Ans. Timber, resins


  1. Name one dicotyledonous and one monocotyledonous family.
    Ans. Fabaceae, Poaceae
  2. Give the number of stamens in
    (a) Papilionaceae – 10
    (b) Malvaceae – infinite
  3. Give botanical names of
    (a) Rice – Oryza sativa
    (b) Arhar – Cajanus cajan
    (c) Ghrit kumari – Aloe barbadumins
  4. Where do seeds develop in angiosperms?
    Ans. In the Ovary after fertilization


  1. Member of which phylum possesses the cnidoblasts?
    Ans. Cnidaria
  2. What do the earthworms possess which help them in locomotion?
    Ans. Cetae
  3. Are all the Platyhelminthes parasites?
    Ans. No
  4. How many pairs of legs do the following have
    (i) Insects – 3
    (ii) Scorpions – 4
    (iii) Spiders – 3
  5. Name the organs by which the starfish move?
    Ans. Tube feet
  6. Give two examples of the Phylum Arthropoda :
    Ans. Prawn, Millipede or any other
  7. Name the phyla which have the following characteristics :
    (i) Tube feet – Echinodermata
    (ii) Cnidoblasts – Cnidaria
    (iii) Chitinous exoskeleton –Arthropoda
    (iv) Jointed legs – Arthropoda
    (v) Nephridia – Annelida
    (vi) Flattened body and a gut without anus – Platyhelminthes


  1. Name the following
    (i) The category of animals possessing backbone – Vertebrata
    (ii) The group of backboned animals but having no jaws – Agnatha
    (iii) Any one cartilaginousfish – Scoliodon
  1. State one difference between cartilaginous and bony fishes.
    Ans. Endoskeleton bony in bony fishes and cartilaginous in cartilaginous fishes
    5 to 7 pairs of gills in cartilaginous fishes and 4 pairs in bony fishes.

  2. Name one bony fish – Labeo, Catla.
  3. List the three main characters of the phylum Chordata.
    Ans. a. notochrod at some stage of life
    b. dorsal tubular nerve cord
    c. gill slits at some stage of life.


  1. How many chambers are there in an amphibian heart?- 3
  2. Name one tailless amphibian – Ichthyophis
  3. What is the literal meaning of the term “amphibia”.?
    Ans. Can live both, in water and on land.


  1. Name an aquatic reptile – Turtle, seasnake
  2. How many chambers are there in the heart of a:
    (i) lizard – Three
    (ii) crocodile – Four
  3. What is the voice box in birds called – Syrinx


  1. Match the items in Column I with those in Column II
    (i) Humans – Primates
    (ii) Platypus –Prototheria
    (iii) Tiger –Carnivora
    (iv) Whale –Cetacea
    (v) Horse –Ungulata
    (vi) Kangaroo – Metatheria
  1. Name the Group of Mammals which includes
    (i) Egg-laying mammals – Prototheria
    (ii) Pouched mammals – Metatheria
    (iii) Flesh-eating mammals – Carnivora
    (iv) Aquatic mammals – Cetacea
    (v) Flying mammals – Cheiroptera
  2. For which characteristic feature are certain animals placed in class mammalia?- Mammary or milk glands
  3. Name a mammal which has marsupium – Kangaroo
  4. Which group of chordates possesses hair ? – Mammalia

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