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A: Triple fusion is associated with the ...

A: Triple fusion is associated with the sexual reproduction inall spermatiophytes
r: It is required to form definitve nucleus as nutritive tissue

A

if both assertion & reason are true and the reason is the correct explanation of the assertion then mark

B

if both assertion & reason are true and the reason is not the correct explanation of the assertion then mark

C

if assertion is true statement but reason is false then mark

D

if both assertion and reason are false statements then mark

Text Solution

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The correct Answer is:
D
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A few statements with regard to sexual reprodction are given below. (i) Sexual reproduction does not always require two individuals. (ii) Sexual reproduction generally involves gametic fusion. (iii) Meiosis never occurs during sexual reproduction. (iv) External fertilisation is a rule during sexual reproduction. Choose the correct statements from the option below.

Which among the following statements are true for sexual reproduction in flowering plants? (i) It requires two types of gametes. (ii) Fertilisation is a compulsory event. (iii) It always results in formation of zygote. (iv) Offspring formed are clones.

A few statements with regard to sexul reproduction are given below : i. Sexual reproduced does not always require two indiviuals . ii. Sexual reproduction generally involves gametic fusion . iii. Meiosis never occurs during sexual reproduction . iv. External fertilisation is a rule during sexual reproduction . Choose the correct statements from the options gives below :

Read the following text and answer the following questions on the basis of the same: During sexual reproduction, the male inserts the sperm into the female reproductive tract, and sperm receive by the ovary and after that sperm fuse with the egg (ovum) in the ampullary region, this process is called fertilization, haploid nucleus of sperm fuse with that of ovum to form Diploid zygote. Site of fusion of sperm with an ovum.

Read the following statements. (A) Their mode of nutrition is holozoic - by ingestion of food (B) Higher forms show elaborate sensory and neuromotor mechanism (C ) Most of them are capable of locomotion (D) The sexual reproduction is by copulation of male and female (E ) They digest their food in an internal cavity Here we are talking about :

Read the following text and answer the following questions on the basis of the same: During sexual reproduction, the male inserts the sperm into the female reproductive tract, and sperm receive by the ovary and after that sperm fuse with the egg (ovum) in the ampullary region, this process is called fertilization, haploid nucleus of sperm fuse with that of ovum to form Diploid zygote. Assertion (A): All copulations do not lead to the fertilisation and pregnancy. Reason (R): Fertilisation can occur only if the ovum and sperms are transported simultaneously to the ampulllary-isthmic junction.

AAKASH INSTITUTE-SEXUAL REPRODUCTION IN FLOWERING PLANTS -Assignment (SECTION D)
  1. A: Each cell fo the sporogenous tissue is capable of giving rise to a ...

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  2. A: In sporoderm pecitocellulosic layer is surrounded by sproropolleni...

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  3. A: The gerative cell comes to lie freely in the cytoplasm of the tube ...

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  4. A: Restitutional nucleus can be observed in endothecium cells R: End...

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  5. A: chalazal vacuole is present in the help cell of embryo sac R: Pol...

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  6. A: Formatin of mature male gametophyte requires one meiotic and one mi...

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  7. A: filiform apparauts guides the pollen tube into the synergids R: I...

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  8. A: Geitonogamy helps in maintaining homozygosity and superiority of t...

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  9. A: Initial growth of pollen tube takes places on expenditure of food p...

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  10. A: Eight cells of octant stage in dicot embryogeny are made by 2 verti...

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  11. A: Triple fusion is associated with the sexual reproduction inall sper...

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  12. A: Anatropous ovule is resupinate ovule R: The body of ovule is comp...

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  13. A: More than one pollen tubes can enter an embryo sac R: Double fert...

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  14. A: hybird seed have to eb produced every year because seeds collected ...

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  15. A: Growth of male gametophyte is completed over the female reproductiv...

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  16. A: certain proteins of pollen orgin identifies the compatible stigam ...

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  17. A: Tetrapid gametophyte can be produced form tetraploid sporophyte by...

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  18. A: continued self pollination checks inbreeding depression R: pollen...

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  19. A: Complete radicle is not produced by hypobasal tier of octant embryo...

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  20. A: Apomicitic embryo is asexual mode of reproduction R: it prevents ...

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