11th Zoology - Book Back Answers - Unit 4 - English Medium Guides

 

 

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Tamil Nadu Board 11th Standard Zoology - Unit 4: Book Back Answers and Solutions

    This post covers the book back answers and solutions for Unit 4 – 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 4 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 4: Organ and Organ Systems In Animals

I. Multiple Choice Questions

1. The clitellum is a distinct part in the body of earthworm Lampito mauritii, it is found in?
a. Segments 13-14
b. Segments 14-17
c. Segments 12-13
d. Segments 14-16
Answer Key:
b. Segments 14-17

2. Sexually, earthworms are
a. Sexes are separate
b. Hermaphroditic but not self -fertilizing
c. Hermaphroditic and self-fertilizing
d. Parthenogenic
Answer Key:
b. Hermaphroditic but not self -fertilizing

3. State whether the statement is true or false
To sustain themselves, earthworms must guide their way through the soil using their powerful muscles. They gather nutrients by ingesting organic matter and soil, absorbing what they need into their bodies. State wheather the statement is true or false: The two ends of the earthworm can equally ingest soil.
a. True
b. False
Answer Key:
b. False

4. The head region of Cockroach ______pairs of ____and _____shaped eyes occur.
a. One pair, sessile compound and kidney shaped
b. Two pairs, stalked compound and round shaped
c. Many pairs, sessile simple and kidney shaped
d. Many pairs, stalked compound and kidney shaped
Answer Key:
a. One pair, sessile compound and kidney shaped

5. The location and numbers of malpighian tubules in Periplaneta.
a. At the junction of midgut and hindgut, about 150.
b. At the junction of foregut and midgut, about 150.
c. Surrounding gizzard, eight.
d. At the junction of colon and rectum, eight.
Answer Key:
a. At the junction of midgut and hindgut, about 150.

6. The type of vision in Cockroach is
a. Three dimensional
b. Two dimensional
c. Mosaic
d. Cockroach do not have vision
Answer Key:
c. Mosaic

7. How many abdominal segments are present in male and female Cockroaches?
a. 10, 10
b. 9, 10
c. 8, 10
d. 9,9
Answer Key:
a. 10, 10

8. Which of the following have an open circulatory system?
a. Frog
b. Earthworm
c. Pigeon
d. Cockroach
Answer Key:
d. Cockroach

9. Buccopharyngeal respiration in frog
a. is increased when nostrils are closed
b. Stops when there is pulmonary respiration
c. is increased when it is catching fly
d. stops when mouth is opened.
Answer Key:
d. stops when mouth is opened.

10. Kidney of frog is
a. Archinephros
b. Pronephros
c. Mesonephros
d. Metanephros
Answer Key:
c. Mesonephros

11. Presence of gills in the tadpole of frog indicates that
a. fishes were amphibious in the past
b. fishes evolved from frog -like ancestors
c. frogs will have gills in future
d. frogs evolved from gilled ancestor
Answer Key:
b. fishes evolved from frog -like ancestors

12. Choose the wrong statement among the following:
a. In earthworm, a pair of male genital pore is present.
b. Setae help in locomotion of earthworms.
c. Muscular layer in the body wall of earthworm is made up of circular muscles only.
d. Typhlosole is part of the intestine of earthworm.
Answer Key:
c. Muscular layer in the body wall of earthworm is made up of circular muscles only.

13. Which of the following are the sense organs of Cockroach?
a. Antennae, compound eye, maxillary palps, anal cerci
b. Antennae, compound maxillary palps and tegmina
c. Antennae, ommatidia, maxillary palps, sternumv and anal style
d. Antennae, eyes, maxillary palps, tarsus of walking legs and coxa
Answer Key:
a. Antennae, compound eye, maxillary palps, anal cerci

 

II. Short answer questions

a

III. Long answer questions

a

IV. Exercise

a