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A : Corpus luteum begins to atrophy a...

A : Corpus luteum begins to atrophy after a short life of 10 to 14 days , if fertilisation does not occur
R : birds possess only the left ovary and left oviduct for conveying the ovum released from the ovary.

A

If both Assertion & Reason are true and the reason is the correct explanation of the assertion then mark (1)

B

If both Assertion & Reason are true but the reason is not the correct explanation of the assertion then mark (2)

C

If Assertion is true statement but Reason is false then mark (3)

D

If both Assertion and Reason are false statement then Mark (4)

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Assertion (A)**: The assertion states that the corpus luteum begins to atrophy after a short lifespan of 10 to 14 days if fertilization does not occur. - The corpus luteum is formed from the remains of the Graafian follicle after ovulation. If fertilization does not happen, the corpus luteum degenerates after about 10 to 14 days. 2. **Understanding the Reason (R)**: The reason states that birds possess only the left ovary and left oviduct for conveying the ovum released from the ovary. - In birds, typically, only the left ovary and left oviduct are functional. The right ovary and oviduct usually do not develop fully. 3. **Evaluating the Assertion**: The assertion is correct because the corpus luteum does indeed atrophy if fertilization does not occur, leading to a decrease in progesterone levels and subsequent breakdown of the endometrium. 4. **Evaluating the Reason**: The reason is also correct as it accurately describes the reproductive anatomy of birds. However, it does not provide a direct explanation for the assertion regarding the corpus luteum. 5. **Conclusion**: Both the assertion and reason are true statements, but the reason does not explain the assertion. Therefore, the correct answer is that both statements are correct, but the reason is not the correct explanation of the assertion. **Final Answer**: Both A and R are correct, but R is not the correct explanation of A. ---
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Corpus luteum in pregnancy has a long life. However if fertilisation does not take place, it remains active only for 10-12 days. Explain.

Corpus luteum in pregnancy has a long life. However if fertilisation does not take place, it remains active only for 10-12 days. Explain.

A : Most birds posses only the left ovary and left oviduct for conveying the ovum released from the ovary R : The avian ovary does not form a corpus luteum from the ruptured ovarian follicle which undergoes rapid shrinkage. (a) If both Assertion & Reason are true and the reason is the correct explanation of the assertion then mark a (b) If both Assertion & Reason are true but the reason is not the correct explanation of the assertion then mark b (c) If Assertion is true statement but Reason is false then mark c (d) If both Assertion and Reason are false statement then mark d

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AAKASH INSTITUTE ENGLISH-HUMAN REPRODUCTION-Assignment ( Section - D ) (Assertion - Reason Type Question ) (In the following question a statement of assertion (A) is followed by a statement of reason (R )
  1. A : placenta is connected to the embryo through an umbilical cor...

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  2. A : All copulations do not lead to fertilisation and pregnancy ....

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  3. A : Lack of menstruation may be indicative of pregnancy R : ...

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  4. A : LH acts on Sertolic cells for release of certain factors re...

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  5. A : The first sign of growing foetus may be noticed by listeni...

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  6. A: Leyding 's cells synthesise and secrete festicular hormones ca...

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  7. A : In spermatogenesis the first haploid forms are spermatids. R...

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  8. A : Presence or absence of hymen is not a reliable inducator of v...

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  9. A : After menopause the levels of blood gonadotropins will rise ...

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  10. A : The secretions of male accessory glands constitute the semi...

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  11. A : Corpus luteum begins to atrophy after a short life of 10 to ...

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  12. A : Most birds posses only the left ovary and left oviduct for...

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  13. A : The most immediate effect of FSH is the maturation of exis...

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  14. A : The morula passes through the phase of compaction produces ...

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  15. A : Developments is the emergence of a multicellular organism f...

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  16. A : Synthesis of milk is stimulated by rise in the level of ox...

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  17. A : Blastocyst undergoes gastrulation to produce the three germinal...

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  18. A : The scrotum acts as temperature regulator for the testes ...

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  19. A : Fertilin protein is present in the egg membrane R : it help...

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  20. Name two Birth control methods.

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