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A : If fertilization occurs the corpu...

A : If fertilization occurs the corpus luteum is rescued from regression by human chorionic gonadotropin which is produced by placenta
R : In first trimester the corpus luteum stimulates by hCG is responsible for the production of progesterone

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)

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Assertion : If fertilization does not occur than the corpus luteum begins to degenerate . Reason : The levels of progesterone and estrogen decline due to degeneration of the corpus luteum .

Hormone which is responsible for maintenance of corpus luteum is

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Which hormone maintains progesterone and estrogen secretion by the corpus luteum through the first trimester of pregnancy ?

Assertion : After fertilization corpus luteum is stable till parturition . Reason : After 3 months of intrauterine life it dominantly secretes progesterone .

Assertion : Chorionic gonadotrophin prevents corpus luteum from involuting. Reason : It has the property similar to luteinzing hormone.

What happens to corpus luteum in human female if the ovum is (i) fertilized, (ii) not fertilized ?

How many of the given statements are correct w.r.t meristmatic tissues? A. The meristems which occur at the tips of roots and shoots are primary meristems. B. Some cells 'left behind ' from the shoot apical meristem constitutes the accessory bud. C. Cork cambium is responsible for producing secondary tissues. D. The process of formation of structurally and functionally specialised cells is known as dedifferentiation. E. The intercalary meristem occurs in grasses and regenerates parts removed by grazing herbivore. F. Interfascicular cambium and fascicular vascular cambium are absent in woody plant axis.

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] : In morula stage, cells divide without any increase in size. [R...

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  2. A : In frog gray cresent is formed during fertilization R : I...

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  3. A : If fertilization occurs the corpus luteum is rescued from r...

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  4. A : if both the ovaries are removed after the first trimester o...

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  5. A : placenta is connected to the embryo through an umbilical cor...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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