Tamil Nadu Board 12th Standard Bio-Zoology - Chapter 1: Book Back Answers and Solutions
This post covers the book back answers and solutions for Chapter 1 – Bio-Zoology from the Tamil Nadu State Board 12th Standard Bio-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 Bio-Zoology Chapter 1 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 12 students! Prepare well and aim for top scores. Thank you!
Chapter 1: Reproduction in Organisms
I. Multiple Choice Questions
a) Arrhenotoky
b) Thelytoky
c) Amphitoky
d) Both a and b
Answer Key:
a) Arrhenotoky
2. The mode of sexual reproduction in bacteria is by
a) Formation of gametes
b) Endospore formation
c) Conjugation
d) Zoospore formation
Answer Key:
c) Conjugation
3. In which mode of reproduction variations are seen
a) Asexual
b) Parthenogenesis
c) Sexual
d) Both a and b
Answer Key:
c) Sexual
4. Assertion and reasoning questions:
In each of the following questions there are two statements. One is assertion (A) and other is reasoning (R). Mark the correct answer as
a. If both A and R are true and R is correct explanation for A
b If both A and R are true but R is not the correct explanation for A
c. If A is true but R is false
d. If both A and R are false.
I. Assertion: In bee society, all the members are diploid except drones.
Reason: Drones are produced by parthenogenesis.
a b c d
Answer Key:
a
II. Assertion: Offsprings produced by asexual reproduction are genetically identical to the parent.
Reason: Asexual reproduction involves only mitosis and no meiosis.
a b c d
Answer Key:
a
II. Short answer questions
12th bio zoolgy III. Long answer questions
12th bio zology
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