NIOS Class 12 Biology Chapter 3 Solution – Kingdom Plantae and Animalia
NIOS Class 12 Biology Solution Chapter 3 Kingdom Plantae and Animalia . NIOS Class 12 Biology Chapter 3 Question Answers Download PDF. NIOS Class 12 Biology Notes.
NIOS Class 12 Biology Chapter 3 Solution
12th (Higher Secondary)
Question Answer, Solution, Notes
1.) Mention one unique feature of bryophytes.
Ans: One unique feature of bryophytes is that they complete their life cycle in water and land.
2) Define alternation of generations.
Ans: Alternation of generations refers to a plant’s life cycle in which it alternates between two distinct life stages, or generations, Such as Alternation of gametophytic phase with sporophytic phase.
3.) Name the male and female sex organs of bryophytes.
Ans: Antheridia and Archegonia are the male and female sex organs of bryophytes
4). List the habitat most suitable for the growth of bryophytes.
Ans: Cool and humid place is most suitable place for growth of bryophytes.
1.) Name the dominant generation of pteridophytes.
Ans: The dominant generation of pteridophytes is Sporophytic.
. 2.) The stage of pteridophytes which produces spores for continuing rest of the life cycle is
Ans: The stage of pteridophytes which produces spores for continuing rest of the life cycle is Sporophyte.
3.) Why do you classify pteridophytes under Trachaeophyta?
Ans: pteridophytes under Trachaeophyta because they have vascular tissues.
4.) Name the male and female reproductive organs in pteridophytes?
Ans: Antheridia and Archegonia are the male and female reproductive organs in pteridophytes
5.) Write the name of gametophyte of fern.
1.) What does the term gymnosperm mean?
Ans: The term gymnosperm mean naked seeds . The gymnospermae bear naked ovules on flat scale leaves called ovuliferous scales which are not enclosed in carpels (ovary)
2.) Give any two common examples of gymnosperms
Ans: Cycas and Pinus are the two common examples of gymnosperms
3) List two commercial products of gymnosperms.
Ans: The two commercial products of gymnosperms are Timbee and resins
1.) Name one dicotyledonous and one monocotyledonous family.
Ans: Fabaceae and Poaceae
2.) Give the number of stamens in (a) Papilionaceae
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: Seeds develop in angiosperms in the Ovary after fertilization
1.) Member of which phylum possesses the cnidoblasts?
Ans : Cnidaria phylum possesses the cnidoblasts
2.) What do the earthworms possess which help them in locomotion?
Ans: Cetae help earthworm in locomotion
3) Are all the Platyhelminthes parasites?
Ans:No,not all the Platyhelminthes are parasites.
4) How many pairs of legs do the following have (i) Insects – Three (ii) Scorpions- four
(iii) Spiders – Three
5) Name the organs by which the starfish move?
Ans: Tube feet is the organs by which the starfish move
6) Give two examples of the Phylum Arthropoda :
Ans: Prawn and Millipede are examples of the Phylum Arthropoda
7) Name the phyla which have the following characteristics : (i) Tube feet. – Echinodermata Platyhelminthes (ii) Cnidoblasts – Cnidaria (iii) Chitinous exoskeleton – Arthropoda (iv) Jointed legs. – Arthropoda (v) Nephridia – Annelida (vi) Flattened body and a gut without anus –Platyhelminthis
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
2.) State one difference between cartilaginous and bony fishes.
Ans: cartilaginous is in cartilaginous fishes whereas Endoskeleton bone is in bony fishes
3) Name one bony fish.
4) List the three main characters of the phylum Chordata.
Ans: 1. Thet have notochrod at some stage of life 2. Possess dorsal tubular nerve cord 3. They gill slits at some stage of life.
1.) How many chambers are there in an amphibian heart?
Ans : There are three chambers in an amphibian heart.
2.) Name one tailless amphibian.
Ans : Ichthyophis is a tailless amphibian.
3) What is the literal meaning of the term “amphibia”.?
Ans : Amphibia means the animan which Can live both, in water as well as on land.
1.) Name an aquatic reptile.
Ans : Turtle, seasnake are the aquatic reptile.
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?
Ans : the voice box in birds is called Syrinx
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
2.) 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
3 ) .For which characteristic feature are certain animals placed in class mammalia?
Ans: Certain animals placed in class mammalian by the feature of having mammary gland .
4) Name a mammal which has marsupium.
Ans: Kangaroo has marsupium
5) Which group of chordates?
Ans: Mammalia possesses hair.
Also See: Chapter No. 2 Question Answer