NIOS Biology 03 Kingdom Plantae and Animalia

NIOS Class 12 Biology Intext Solutions Chapter 3

INTEXT QUESTIONS 3.1

1. Mention one unique feature of bryophytes.

Ans: They complete their life cycle in water and on land.

2. Define alternation of generations.

Ans: Alternation of the gametophytic phase with the 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.

INTEXT QUESTIONS 3.2

1. Name the dominant generation of pteridophytes.

Ans: Sporophytic generation. 

2. The stage of pteridophytes which produces spores for continuing rest of the life cycle is.

Ans: Sporophyte

3. Why do you classify pteridophytes under Tracheophyta?

Ans: They have vascular tissues

4. Name the male and female reproductive organs in pteridophytes?

Ans: Antheridia and Archegonia

5. Write the name of the gametophyte of ferns.

Ans: Prothallus

INTEXT QUESTIONS 3.3

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

INTEXT QUESTIONS 3.4

1. Name one dicotyledonous and one monocotyledonous family.

Ans: Fabaceae, Poaceae.

2. Give the number of stamens in

(a) Papilionaceae ..

(b) Malvaceae ..

Ans: (a) 10, (b)  infinite

3. Give botanical names of

(a) Rice ..

(b) Arhar ..

(c) Ghrit kumari ..

Ans: (a) Oryza sativa

(b) Cajanus cajan

(c) Aloe barbadumins

4. Where do seeds develop in angiosperms?

Ans: In the Ovary after fertilization

INTEXT QUESTIONS 3.5

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; 

(ii) Scorpions;

(iii) Spiders 

Ans: (i) 3

(ii) 4

(iii) 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. ……..

(ii) Cnidoblasts……

(iii) Chitinous exoskeleton ..

(iv) Jointed legs …..

(v) Nephridia …

(vi) Flattened body and a gut without anus.

Ans: 

• (i) Echinodermata
• (ii) Cnidaria
• (iii) Arthropoda 
• (iv) Arthropoda
• (v) Annelida 
• (vi) Platyhelminthes

INTEXT QUESTIONS 3.6

1. Name the following

(i) The category of animals possessing a backbone.

Ans: Vertebrata 

(ii) The group of back-boned animals but having no jaws.

Ans: Agnatha

(iii) Any one cartilaginous fish.

Ans: Scoliodon

2. State one difference between cartilaginous and bony fishes.

Ans: Endoskeleton is bony in bony fishes and cartilaginous in cartilaginous fishes, or 5 to 7 pairs of gills in cartilaginous fishes and 4 pairs in bony fishes.

3. Name one bony fish.

Ans: Labeo, Catla.

4. List the three main characters of the phylum Chordata.

Ans: 

• Notochord at some stage of life
• Dorsal tubular nerve cord
• Gill slits at some stage of life.

INTEXT QUESTIONS 3.7

1. How many chambers are there in an amphibian heart?

Ans: Three 

2. Name one tailless amphibian.

Ans: Ichthyophis

3. What is the literal meaning of the term “amphibia”.?

Ans: Can live both in water and on land.

INTEXT QUESTIONS 3.8

1. Name an aquatic reptile.

Ans: Turtle, seasnake

2. How many chambers are there in the heart of a:

(i) lizard; ..

(ii) crocodile ..

Ans: Three and four

3. What is the voice box in birds called?

Ans: Syrinx

INTEXT QUESTIONS 3.9

1. Match the items in Column I with those in Column II.

Column I	Column II
(i) Humans	(a) Carnivora
(ii) Platypus	(b) (b) Ungulata
(iii) Tiger	(c) (c) Primates
(iv) Whale	(d) Prototheria
(v) Horse	(e) Metatheria
(vi) Kangaroo	(f) Cetacea

Ans: 

• (i) – c 
• (ii) – d 
• (iii) – a 
• (iv) – f 
• (v) – b 
• (vi) – e

2. Name the Group of Mammals that includes

(i) Egg-laying mammals 

(ii) Pouched mammals 

(iii) Flesh-eating mammals 

(iv) Aquatic mammals 

(v) Flying mammals 

Ans: 

• (i) Prototheria 
• (ii) Metatheria 
• (iii) Carnivora 
• (iv) Cetacea 
• (v) Cheiroptera

3. For which characteristic feature are certain animals placed in class Mammalia?

Ans: Mammary or milk glands

4. Name a mammal which has a marsupium.

Ans: Kangaroo

5. Which group of chordates possesses hair?

Ans: Mammalia

Additional Study Materials

• NIOS Class 12 Biology Terminal Questions Answers!
• Chapter 01 Intext Solutions
• Chapter 02 Intext Solutions