11th Zoology - Book Back Answers - Unit 13 - English Medium Guides

 

 

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Tamil Nadu Board 11th Standard Zoology - Unit 13: Book Back Answers and Solutions

    This post covers the book back answers and solutions for Unit 13 – 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 13 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 13 : Trends in Economic Zoology

I. Multiple Choice Questions

1. Which one of the following is not related to vermiculture?
i. Maintains soil fertility
ii. Breakdown of inorganic matter
iii. Gives porosity, aeration and moisture holding capacity
iv. Degradation of non biodegradable solid waste
a. i and ii is correct
b. iii and iv is correct
c. ii and iv is not correct
d. i and iii is not correct
Answer Key:
c. ii and iv is not correct

2. Which one of the following is not an endemic species of earthworm?
a. Perionyx
b. Lampito
c. Eudrillus
d. Octochaetona
Answer Key:
c. Eudrillus

3. Match the following and select the correct option
1. Bombyx mori                    i. Champa           -     I.  Muga
2. Antheraea assamensis         ii. Mulberry      -     II. Eri
3. Antheraea                             iii. Arjun         -     III. Tassar
4. Attacus ricini                        iv. Castor        -      IV. Mulberry
a) 1-ii-IV
b) 2-iii-II
c) 3-1-1
d) 4-iv-III
Answer Key:
a) 1-ii-IV

4. Silk is obtained from ....
a. Laccifer lacca
b. Nosema bombycis
c. Attacus ricini
d. Attacus mylitta
Answer Key:
c. Attacus ricini

5. Assertion: Nuptial flight is a unique flight taken the queen bee followed by several drones.
Reason: The queen bee produces a
chemical substance called pheromone. The drones in that area are attracted to the pheromone and then mating takes place.
a. Assertion and reason is correct but not related
b. Assertion and reason is incorrect but related
c. Assertion and reason is correct but related
d. Assertion and reason is incorrect but not related
Answer Key:
c. Assertion and reason is correct but related

6. Rearing of honey bee is called
a. Sericulture
b. Lac culture
c. Vermiculture
d. Apiculture
Answer Key:
d. Apiculture

7. Which of the statement regarding Lac insect is TRUE?
a. A microscopic, resinous crawling scale insect
b. Inserts its proboscis into plant tissue suck juices and grows
c. Secretes lac from the hind end of body.
d. The male lac insect is responsible for large scale production of lac.
Answer Key:
d. The male lac insect is responsible for large scale production of lac.

8. Prawn belongs to the class
a. crustacea
b. Annelida
c. Coelenterata
d. Echinodermata
Answer Key:
a. crustacea

9. Aquaponics is a technique which is
a. A combination of aquaculture and fish culture
b. A combination of aquaculture and hydroponics
c. A combination of vermiculture and hydroponics
d. A combination of aquaculture and prawn culture.
Answer Key:
b. A combination of aquaculture and hydroponics

10. Inland fisheries are
a. deep sea fishing
b. capturing fishes from sea coast
c. Raising and capturing fishes in fresh water
d. oil extraction from fish
Answer Key:
c. Raising and capturing fishes in fresh water

11. Induced breeding technique is used in
a. Marine fishery
b. Capture fishery
c. Culture fishery
d. Inland fishery
Answer Key:
d. Inland fishery

12. Isinglass is used in
a. Preparation
b. Clearing of wines
c. Distillation of wines
b. Clearing of wines
Answer Key:
b. Clearing of wines

13. Choose the correctly matched pair
a. Egg layers - Brahma
b. Broiler types - Leghorn
c. Dual purpose -White Plymouth rock
d. Ornamental breeds – Silkie
Answer Key:
d. Ornamental breeds – Silkie

 

II. Short answer questions

a

III. Long answer questions

a

IV. Exercise

a