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[A] : In morula stage, cells divide with...

[A] : In morula stage, cells divide without any increase in size.
[R] : Zona pellucida remains undivided till cleavege finished

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

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The correct Answer is:
B
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A : in morula stage the cells divide without any increase in size R : zona pellucida remains intact till cleavage is completed

Given below are assertion and reason. Poin t out if both are true and the reason is correct explanation (A), both are true but reason is not correct explanation (B), assertion is ture but reason is wrong © and both are wrong(D) Assertion: in morula stage cell divides without increase in size. Reason. Zona pellucida remains till cleavage is finished

Statement-1: Upto morula stage, the cells divide without any increase in size. Statement-2: Zona pellucida remains intact till cleavage is complete.

Assertion: The cells divide without any increase in size up to morula stage. Reason: Zona pellucida remains intact till cleavage is complete.

At fully turgid stage the cell wall prevents the protoplast from increasing in size and exerts a pressure called

Read the following statements and find out the INCORRECT statement. a. Plant growth is unique because plants retain the capacity for unlimited growth throughout their life. b. Growth, at a cellular level , is principally a consequence of the increase in the amount of protoplasm. c. One single maize root apical meristem can give rise to more than 3,50,00 new cells per hour , whereas cells in watermelon may increase in size by up to 17, 500 times. d. Environmental signals such as light , temperature and gravity also affect certain phases or stages of growth. e. In geometric growth, following mitotic cell division , only one daughter cell continues to divide while the other differentiates adn matures.

[A] : Natural populations are capable of an enormous and rapid increase is numbers but for the most part remain relatively constant in size . [R] : Human interference has led to constancy in the size of the natural populations .

Read the following statements and choose the correct ones A. Increase in length of a plant organ against time gives sigmoid curves. B. Incase of microorganisms showing geometric growth, all the daughter cells divide. C. Environmental factors like light and gravity affects different stages of growth of plants. D. A tree showing seasonal activities doesn't show a typical S-shaped curve.

A: In a diamagnetic substance each atom has a non-zero dipole moment but due to thermal agitation the individual dipoles ramein randomly oriented and, therefore, the net dipole moment in any finite volume of the substance remains zero. R: On increasing the temperature the magnetism inside a perament magent increases.

A point charges Q is moving in a circular orbit of radius R in the x-y plane with an angular velocity omega . This can be considered as equivalent to a loop carrying a steady current (Q omega)/(2 pi) . S uniform magnetic field along the positive z-axis is now switched on, which increases at a constant rate from 0 to B in one second. Assume that the radius of hte orbit remains constant. The application of hte magnetic field induces an emf in the orbit. The induced emf is defined as the work done by an induced electric field in moving a unit positive charge around a closed loop. It si known that, for an orbiting charge, the magnetic dipole moment is proportional to the angular momentum with a porportionality constant lambda . The magnitude of the induced electric field in the orbit at any instant of time during the time interval of the mangnetic field change is

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 human ovum is alecithal type. R : is is almost free of y...

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  2. A : Oxytocin acts on the uterine muscles and cause stronger uter...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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