Match List I with List II related to embryonic development at various months of pregnancy: List-I List-II A. The foetus movement starts and hair appears on the head (I) 24 weeks of pregnancy B. The fo

According to the human embryonic development timeline: - By the end of the second month (8 weeks), the foetus develops limbs and digits (B-III). - By the end of 12 weeks (first trimester), most major organ systems are formed, including well-developed external genital organs (C-IV). - During the fifth month (approx. 20 weeks), the first movements of the foetus and appearance of hair on the head are observed (A-II). - By the end of 24 weeks (second trimester), the body is covered with fine hair, e

Match List I with List II related to embryonic development at various months of pregnancy: List-I List-II A. The foetus movement starts and hair appears on the head (I) 24 weeks of pregnancy B. The fo

According to the human embryonic development timeline: - By the end of the second month (8 weeks), the foetus develops limbs and digits (B-III). - By the end of 12 weeks (first trimester), most major organ systems are formed, including well-developed external genital organs (C-IV). - During the fifth month (approx. 20 weeks), the first movements of the foetus and appearance of hair on the head are observed (A-II). - By the end of 24 weeks (second trimester), the body is covered with fine hair, e

Match List I with List II related to embryonic development at various months of pregnancy: List-I List-II A. The foetus…

Year	2024	Total
Questions	3	3

Year

2024

Total

Questions

List-I	List-II
A. The foetus movement starts and hair appears on the head	(I) 24 weeks of pregnancy
B. The foetus develops limbs and digits	(II) 20 weeks of pregnancy
C. The foetus develops external genital organs	(III) 8 weeks of pregnancy
D. The foetus body is covered with fine hair; eyelids separate and eyelashes are formed	(IV) 12 weeks of pregnancy

List-I

List-II

A. The foetus movement starts and hair appears on the head

(I) 24 weeks of pregnancy

B. The foetus develops limbs and digits

(II) 20 weeks of pregnancy

C. The foetus develops external genital organs

(III) 8 weeks of pregnancy

D. The foetus body is covered with fine hair; eyelids separate and eyelashes are formed

(IV) 12 weeks of pregnancy

Solution & Explanation

Core Logic

According to the human embryonic development timeline:

By the end of the second month (8 weeks), the foetus develops limbs and digits (B-III).
By the end of 12 weeks (first trimester), most major organ systems are formed, including well-developed external genital organs (C-IV).
During the fifth month (approx. 20 weeks), the first movements of the foetus and appearance of hair on the head are observed (A-II).
By the end of 24 weeks (second trimester), the body is covered with fine hair, eyelids separate, and eyelashes are formed (D-I).

Step 1: Final Conclusion

The correct matches are A-II, B-III, C-IV, D-I.

Pattern Recognition

Movement & head hair = 5th month / 20 weeks (A-II). Limbs & digits = end of 2nd month / 8 weeks (B-III). Match these two and the correct option is clear.

Chapter Mix

Class 12 Biology: Human Reproduction

More Human Reproduction Previous-Year Questions

Q143 neet_2026_03_may_morning Gametogenesis

Spermatogonia undergo a series of cell divisions statements to produce sperms. Select the correct from the following : A. Spermatogonia always undergo meiotic cell division. B. Primary spermatocytes divide mitotically to produce secondary spermatocytes. C. Secondary spermatocytes, through their second meiotic division, produce haploid spermatids. D. Spermatids produce spermatozoa through mitosis. E. Spermatids transform into spermatozoa by spermiogenesis. Choose the correct answer from the options given below:

A. C and E only
B. A, C and E only
C. B, C and D only
D. A and E only

Solution

Core Logic

Let's review the spermatogenesis process:

A is incorrect: Spermatogonia multiply by mitotic division to increase their numbers, not meiosis.
B is incorrect: Primary spermatocytes undergo the first meiotic division (reduction division) to form secondary spermatocytes.
C is correct: Secondary spermatocytes undergo the second meiotic division to form haploid spermatids.
D is incorrect: Spermatids do not undergo mitosis. They undergo cellular differentiation.
E is correct: The transformation process of spermatids into mature spermatozoa (sperms) is called spermiogenesis.

Step 1: Final Conclusion

The correct statements are C and E only.

Pattern Recognition

Gonia = Mitosis. Primary -> Secondary = Meiosis I. Secondary -> Spermatids = Meiosis II. Spermatids -> Spermatozoa = Spermiogenesis (differentiation, not division).

Chapter Mix

Class 12 Biology: Human Reproduction

Q161 neet_2026_03_may_morning Oogenesis and Ovum Structure

Arrange the following cell layers/structures around the female gamete, from outer to inner side: A. Zona pellucida B. Perivitelline space C. Corona radiata D. Plasma membrane of ovum Choose the correct answer from the options given below:

A. C, A, D, B
B. C, A, B, D
C. D, B, A, C
D. A, C, B, D

Solution

Core Logic

The cell layer/structure around the female gamete from outer to inner side is: Corona radiata (C) $arrow$ $\rightarrow$ Zona pellucida (A) $arrow$ $\rightarrow$ Perivitelline space (B) $arrow$ $\rightarrow$ Plasma membrane of ovum (D). So the correct answer is C, A, B, D.

Oogenesis and Ovum Structure diagram for Q161 - NEET 2024 Morning

Pattern Recognition

Corona radiata is the outermost cellular layer. Zona pellucida is the acellular layer beneath it. The perivitelline space separates the zona from the actual plasma membrane of the oocyte.

Chapter Mix

Class 12 Biology: Human Reproduction

Solution & Explanation

Core Logic

Step 1: Final Conclusion

Pattern Recognition

Chapter Mix

Reference Study Guides

More Human Reproduction Previous-Year Questions

Solution

Core Logic

Step 1: Final Conclusion

Pattern Recognition

Chapter Mix

Solution

Core Logic

Pattern Recognition

Chapter Mix

More Human Reproduction Questions — neet_2026_03_may_morning

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Solution & Explanation

Core Logic

Step 1: Final Conclusion

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Reference Study Guides

More Human Reproduction Previous-Year Questions

Solution

Core Logic

Step 1: Final Conclusion

Pattern Recognition

Chapter Mix

Solution

Core Logic

Pattern Recognition

Chapter Mix

More Human Reproduction Questions — neet_2026_03_may_morning

Select Your Target Exam

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