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Parthenogenesis occurs in...

Parthenogenesis occurs in

A

When embryo is formed without the fusion of egg and the sperm

B

When embryo is formed by the fusion of egg and sperm

C

When embryo is from another cell

D

When sperm produce the embryo directly

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Consider the following statements and select the incorrect ones. I. Honeybee has developed arrhenotoky in which the male develop from the fertilised egg and the female from unfertilised egg. II. In the thelytoky, the haploid unfertilised egg parthenogenetically develop into females. III. Heterogamy is the alteration between parthenogenesis and asexual reproduction. IV. Parthenogenesis occurs naturally during reproducing in ants and aphids. Choose the correct codes.

Parthenogenesis is

Menses occurs in

Meiosis occurs in

Meiosis occurs in

Assertion: Parthenogenesis does not contribute to organic evolution. Reason: Parthenogenesis is a method to establish triploid and aneuploid chromosomal combination.

Assertion : Parthenogenesis does not play any role in organic evolution. Reason : In parthenogenesis females develop into new organisms without fertilisation.

endodermis occurs in

Natural parthenogenesis is found in

The term parthenogenesis was coined by

ALLEN-REPRODUCTION IN ORGANISMS AND SEXUAL REPRODUCTION IN FLOWERING PLANTS-EXERCISE-III (B) (ANALYTICAL QUESTION )
  1. If the nucellus cell of an Angiosperm contains 24 chromosomes the numb...

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  2. In Angiosperm, if haploid number of chromosome is 12 then what will be...

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  3. How many meiotic divisions are required for the formation of 200 seed...

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  4. In Angiosperm, if number of chromosomes in endosperm is 30, what will ...

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  5. How many meiotic division are required to form 100 zygotes in family C...

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  6. How many meiotic divisions are necessary for formation of 100 function...

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  7. The seeds of which type of plant have no dormancy

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  8. Cotyledons absent in seed of

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  9. The viability of seeds can be ascertained with the help of

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  10. Ornithophily takes place in :

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  11. Anemophily type of pollination is found in

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  12. In grasses what happens in micro spore mother cell for the formation o...

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  13. In a flowering plant, archesporium gives rise to

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  14. A diploid female plant and a tetraploid male plant are crossed. The pl...

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  15. Parthenogenesis occurs in

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  16. Anther culture yields some haploid and diploid plants. Diploid plants ...

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  17. Double fertilization is essential for formation of

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  18. In which one pair, both the plants can be vegetatively propagated by l...

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  19. In a type of apomixids known as adventive embryony embryos develop dir...

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  20. Double fertilisation involves

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