11th Zoology - Book Back Answers - Unit 2 - English Medium Guides

 

 

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Tamil Nadu Board 11th Standard Zoology - Unit 2: Book Back Answers and Solutions

    This post covers the book back answers and solutions for Unit 2 – Zoology from the Tamil Nadu State Board 11th Standard Zoology textbook. These detailed answers have been carefully prepared by our expert teachers at KalviTips.com.

    We have explained each answer in a simple, easy-to-understand format, highlighting important points step by step under the relevant subtopics. Students are advised to read and memorize these subtopics thoroughly. Once you understand the main concepts, you’ll be able to connect other related points with real-life examples and confidently present them in your tests and exams.

    By going through this material, you’ll gain a strong understanding of Zoology  Unit 2 along with the corresponding book back questions and answers (PDF format).

Question Types Covered:

• 1 Mark Questions: Choose the correct answer, Fill in the blanks, Identify the correct statement, Match the following 
• 2 Mark Questions: Answer briefly 
• 3, 4, and 5 Mark Questions: Answer in detail

All answers are presented in a clear and student-friendly manner, focusing on key points to help you score full marks.

All the best, Class 11 students! Prepare well and aim for top scores. Thank you!

Unit 2 : Kingdom  Animalia

I. Multiple Choice Questions

1. The symmetry exhibited in cnidarians is
a. Radial
b. Bilateral
c. Pentamerous radial
d. Asymmetrical
Answer Key:
a. Radial

2. Sea anemone belongs to phylum
a. Protozoa
b. Porifera
c. Coelenterata
d. Echinodermata
Answer Key:
c. Coelenterata

3. The excretory cells that are found in platyhelminthes are
a. Protonephridia
b. Flame cells
c. Solenocytes
d. All of these
Answer Key:
b. Flame cells

4. In which of the following organisms, self  fertilization is seen.
a. Fish
b. Round worm
c. Earthworm
d. Liver fluke
Answer Key:
d. Liver fluke


5. Nephridia of Earthworms are performing the same functions as
a. Gills of prawn
b. Flame cells of Planaria
c. Trachea of insects
d. Nematoblasts of Hydra
Answer Key:
b. Flame cells of Planaria

6.Which of the following animals has a true  coelom?
a. Ascaris
b. Pheretima
c. Sycon
d. Taenia solium
Answer Key:
b. Pheretima

7. Metameric segmentation is the main feature of
a. Annelida
b. Echinodermata
c. Arthropoda
d. Coelenterata
Answer Key:
a. Annelida

8. In Pheretima locomotion occurs with the help of
a. circular muscles
b. longitudinal muscles and setae
c. circular, longitudinal muscles and setae
d. parapodia
Answer Key:
c. circular, longitudinal muscles and setae

9. Which of the following have the highest number of species in nature?
a. Insects
b. Birds
c. Angiosperms
d. Fungi
Answer Key:
a. Insects

10. Which of the following is a crustacean?
a. Prawn
b. Snail
c. Sea anemone
d. Hydra
Answer Key:
a. Prawn

11. The respiratory pigment in cockroach is
a. Haemoglobin
b. Haemocyanin
c. Haemoerythrin
d. None of the above
Answer Key:
d. None of the above

12. Exoskeleton of which phylum consists of chitinous cuticle?
a. Annelida
b. Porifera
c. Arthropoda
d. Echinodermata
Answer Key:
c. Arthropoda

13. Lateral line sense organs occur in
a. Salamander
b. Frog
c. Water snake
d. Fish
Answer Key:
d. Fish

14. The limbless amphibian is
a. Icthyophis
b. Hyla
c. Rana
d. Salamander
Answer Key:
a. Icthyophis

15.Four chambered heart is present in
a. Lizard
b. Snake
c. Scorpion
d. Crocodile
Answer Key:
d. Crocodile

16.Which of the following is not correctly paired?
a. Humans -Ureotelic
b. Birds -Uricotelic
c. Lizards -Uricotelic
d. Whale -Ammonotelic
Answer Key:
d. Whale –Ammonotelic

17.Which of the following is an egg laying mammal?
a. Delphinus
b. Macropus
c. Ornithorhynchus
d. Equus
Answer Key:
c. Ornithorhynchus

18.Pneumatic bones are seen in
a. Mammalia
b. Aves
c. Reptilia
d. Sponges
Answer Key:
b. Aves

19. Match the following columns and select the correct option.
Column – I                      Column - II
(p) Pila                            (i) Devil fish
(q) Dentalium                 (ii) Chiton
(r) Chaetopleura             (iii) Apple snail
(s) Octopus                     (iv) Tusk shell
a. p(ii),  q(i),   r(iii), s (iv)
b. p(iii), q(iv),  r (ii), s(i)
c. p(ii),  q(iv),  r(i),   s(ii)
d. p(i),   q(ii),  r(iii), s(iv)
Answer Key:
b. p(iii), q(iv),  r(ii), s(i)

 
20. In which of the following phyla, the adult shows radial symmetry but the larva shows bilateral symmetry?
a. Mollusca
b. Echinodermata
c. Arthropoda
d. Annelida
Answer Key:
b. Echinodermata

21. Which of the following is correctly matched?
a. Physalia - Portugese man of war
b. Pennatula - Sea fan
c. Adamsia - Sea pen
d. Gorgonia - Sea anemone
Answer Key:
a. Physalia – Portugese man of war

 

II. Short answer questions

11th  zoolgy

III. Long answer questions

11th  zology

IV. Exercise

11th  zoolgy