Tamil Nadu Board 12th Standard Bio-Zoology - Chapter 2: Book Back Answers and Solutions
This post covers the book back answers and solutions for Chapter 2 – 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 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 12 students! Prepare well and aim for top scores. Thank you!
Chapter 2: Human Reproduction
I. Multiple Choice Questions
a. Seminiferous tubules
b.Vas deferens
c. Epididymis
d. Seminal vesicle
Answer Key:
c. Epididymis
2. The male sex hormone testosterone is secreted from
a. Sertoli cells
b. Leydig cell
c. Epididymis
d. Prostate gland
Answer Key:
b. Leydig cell
3. The glandular accessory organ which produces the largest proportion of semen is
a. Seminal vesicle
b. Bulbourethral gland
c. Prostate gland
d. Mucous gland
Answer Key:
a. Seminal vesicle
4. The male homologue of the female clitoris is
a. Scrotum
b. Penis
c. Urethra
d.Testis
Answer Key:
b. Penis
5. The site of embryo implantation is the
a. Uterus
b. Peritoneal cavity
c. Vagina
d. Fallopian tube
Answer Key:
a. Uterus
6. The foetal membrane that forms the basis of the umbilical cord is
a. Allantois
b. Amnion
c. Chorion
d. Yolk sac
Answer Key:
a. Allantois
7. The most important hormone in intiating and maintaining lactation after birth is
a. Oestrogen
b. FSH
c. Prolactin
d. Oxytocin
Answer Key:
c. Prolactin
8. Mammalian egg is
a. Mesolecithal and non cleidoic
b. Microlecithal and non cleidoic
c. Alecithal and non cleidoic
d. Alecithal and cleidoic
Answer Key:
c. Alecithal and non cleidoic
9. The process which the sperm undergoes before penetrating the ovum is
a. Spermiation
b. Cortical reaction
c. Spermiogenesis
d. Capacitation
Answer Key:
d. Capacitation
10. The milk secreted by the mammary glands soon after child birth is called
a. Mucous
b. Colostrum
c. Lactose
d. Sucrose
Answer Key:
b. Colostrum
11. Colostrum is rich in
a. Ig E
b. Ig A
c. Ig D
d. Ig M
Answer Key:
b. Ig A
12. The Androgen Binding Protein (ABP) is produced by
a. Leydig cells
b. Hypothalamus
c. Sertoli cells
d. Pituitary gland
Answer Key:
c. Sertoli cells
13. Find the wrongly matched pair
a. Bleeding phase - fall in oestrogen and progesterone
b. Follicular phase - rise in oestrogen
c. Luteal phase - rise in FSH level
d. Luteal phase - LH surge
Answer Key:
c. Luteal phase - rise in FSH level
Answer the following type of questions
Assertion (A) and Reason (R)
a. A and R are true, R is the correct explanation of A
b. A and R are true, R is not the correct explanation of A
c. A is true, R is false
d. Both A and R are false
14. A – In human male, testes are extra abdominal and lie in scrotal sacs.
R – Scrotum acts as thermoregulator and keeps temperature lower by 2oC for normal sperm production.
Answer Key:
(a) A and R are true, R is the correct explanation of A
15. A – Ovulation is the release of ovum from the Graafian follicle.
R – It occurs during the follicular phase of the menstrual cycle.
Answer Key:
(c) A is true, R is false
16. A – Head of the sperm consists of acrosome and mitochondria.
R – Acrosome contains spiral rows of mitochondria.
Answer Key:
(d) Both A and R are false
II. Short answer questions
12th bio zoolgy III. Long answer questions
12th bio zology
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