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Distinguish between pollination and fert...

Distinguish between pollination and fertilisation. Mention the site and product, of fertilisation in a flower. Draw a neat, labelled diagram of a pistil showing pollen tube growth and its entry into the ovule.

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What is 'double fertilisation'? Describe it with the help of a neat and well labelled diagram. Give its importance.

(a) Draw a diagrammatic sectional view of a mature anatropous ovule and label the following parts in it : (i) that develops into seed coat. (ii) that develops into an embryo after fertilization. (iii) that develops into an endosperm in an albuminous seed. (iv) through which the pollen tube gains entry into the embryo sac. (v) that attaches the ovule to the placenta. (b) Describe the characteristic features of wind pollinated flowers.

Distinguish between forced vibrations and resonance. Draw neat, labelled diagrams for the modes of vibration of a streched string in second harmonic and third harmonic. The area of the upper face of a rectangular block is 0.5mxx0.5m and the lower face is fixed. The height of the block is 1cm . A shearing force applied at the top face produces a displacement of 0.015 mm . Find the strain and shearing force. (Modulus of rigidity : eta=4.5xx10^(10)N//m^(2) )

OSWAL PUBLICATION-REPRODUCTION-NCERT EXEMPLAR (SHORT ANSWER QUESTIONS)
  1. Is the chromosome number of zygote, embryonal cells and adult of a par...

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  2. Where is the zygote located in the flower after fertilisation?

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  3. Reproduction is linked to stability of population of a species. Justif...

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  4. How are general growth and sexual maturation different from each other...

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  5. Trace the path of sperm during ejaculation and mention the gland and t...

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  6. What changes are observed in the uterus if fertilisation does not occu...

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  7. What changes are observed in the uterus subsequent to implantation of ...

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  8. What are the benefits of using mechanical barriers during sexual act?

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  9. In the given figure label the parts and mention their functions (a)P...

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  10. What would be the ratio of chromosome number between an egg and its zy...

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  11. Why are budding, fragmentation and regeneration all considered as asex...

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  12. Write two points of difference between asexual and sexual types of rep...

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  13. Distinguish between pollination and fertilisation. Mention the site an...

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  14. Distinguish between a gamete and zygote. Explain their roles in sexual...

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  15. Draw the diagram of a flower and label the four whorls. Write the name...

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  16. What is placenta? Mention its role during pregnancy?

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  17. What are various ways to avoid pregnancy? Elaborate any one method.

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  18. How does fertilisation take place? Fertilisation occurs once in a mont...

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  19. Reproduction is essentially a phenomenon that is not for survival of a...

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  20. Describe sexually transmitted diseases and mention the ways to prevent...

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