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A cellular layer made up of glycoprotein...

A cellular layer made up of glycoproteins within Graafian follicle around ovum prevents ectopic pregnancy is
(a) corona radiata
(b) granulosa
(c) Zona pellucida
(d) Theca externa

A

corona radiata

B

granulosa

C

Zona pellucida

D

Theca extema

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Acellular layer made up of glycoproteins within Graafian follicle around ovum prevents ectopic pregnancy is

Which of the following layers of the ovum undergoes changes to prevent polyspermy when sperm contacts with it ? (a) Corona radiata (b) Plasma membrane (c) Zona pellucida (d) Tunica albuginea

Assertion : Presence of zona pallucida over the fertilized ovum prevents ectopic pregnancy . Reason : Zona pellucida helps the ovum to penetrate endometrium .

Each of the following questions/statements has four suggested answers. Choose the correct answer: Layers of an ovum from outside inside are:- i. Corona radiata, zona pellucida and vitelline membrane ii. Zona pellucida, corona radiata and vitelline membrane iii. Vitelline membrane, zona pellucida and corona radiata iv. Zona pellucida, vetelline membrane and corona radiata

Consider the following statements with respect to pollen grains (a) Exine is thin, continuous layer made up of cellulose and pectin (b) Hard outer layer called exine is made of sporopollenin (c) Sporopollenin is present in germ pores (d) Exine exhibits a fascinating array of patterns and designs. Of the above statements

(a) Draw a diagram of the structure of a human ovum surrounded by corona radiata. Label the following parts : (i) Ovum, (ii) Plasma Membrane, (iii) Zona Pellucida (b) State the function of Zona Pellucida.

How many of the given statements are incorrect? A. The ovaries are located on each side of the lower abdomen. B. Mons pubis a cushion of fatty tissue covered by skin and pubic hair. C. A primary spermatocyte completes the second meiotic division leading to the formation of two equal, haploid cells called secondary spermatocytes, which have only 23 chromosomes each. D. The secondary follicles get surrounded by more layers of granulosa cells and a new theca, they are called tertiary follicles.

Arrange the following events occurring in the ovary in the CORRECT sequence a. The antrum is formed . b. Formation of a first tiny polar body . c. The primary follicles get surrounded by more and more layers of granulosa cells. d. The primary oocytes is arrested in prophase - I of the meiotic division .

Read the following statements (A - D) and answer the question that follows them - A Infundibulum in the thyroid is a thin flap of connective tissue . B - Rupturing of Graafian follicles to release ovum is mediated by LH. C - Source of GH and Prolactin are different D - Hormones are non - nutrient chemicals. How many of the above statements are incorrect ?

(a) Name the organic material exine of the pollen grain is made up of. How is this material advantageous to pollen grain ? (b) Still it is observed that it does not form a continuous layer around the pollen grain. Give reason. (c) How are 'pollen banks' useful ?

AAKASH INSTITUTE ENGLISH-TEST 5-EXAMPLE
  1. Select the correct match w.r.t. the vegetative propagules.

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  2. Lifespan

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  3. A cellular layer made up of glycoproteins within Graafian follicle aro...

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  4. Meiosis I in female gametogenesis is completed in (a) Primary oocyte i...

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  5. A wider region, called ampula is not a part of which of the following ...

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  6. During in fertilized egg which Centroile of sperm is responsible for f...

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  7. What is correct about hormones in a normal healthy pregnant women?

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  8. Milk ejection hormone in a lactating mother is

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  9. First sign of growing foetus that is noticed is

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  10. Choose the odd one w.r.t. number.

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  11. Activation of sperms in female genital tract to facilitate fertilizati...

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  12. Which among the following part of male reproductive system is not cons...

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  13. The vital link ensures continuity of species between organisms of one ...

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  14. Combined pill called OCP contain a mixture of (a) GnRH and FSH (b) ...

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  15. Select the odd one w.r.t. sexuality of organism.

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  16. Maximum life span is a characteristic of A and life expectancy is the ...

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  17. The organism which are considered as immortal is/are (a) Ameoba only ...

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  18. TSH is secreted by

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  19. Government of india legalised MTP in

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  20. Select the incorrect Statement W.r.t clevage in humans

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