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Heterosporous vascular cryptogams fail t...

Heterosporous vascular cryptogams fail to develop seeds because

A

(a) Fusion of gametes results in formation of zygote which develops into embryo

B

(b) They lack precocious germination of spores

C

(c) Female gametes are large and non-motile

D

(d) Retention of megaspores permanently within the megasporangia has not become established

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AAKASH INSTITUTE ENGLISH-TEST 2-EXERCISE
  1. In some plants growing in swampy areas, many roots come out of the gro...

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  2. In Salvia and mustard, stamens are

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  3. Heterosporous vascular cryptogams fail to develop seeds because

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  4. Flowers of tobacco and onion plants have

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  5. In which of the following plant (s) dominant phase is the independent,...

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  6. Which of the following is incorrectly matched?

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  7. Mark the correct option w.r.t. analogous structures.

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  8. What will be the number of chromosomes in endosperm (p) and perisperm ...

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  9. Which of the following is a wrong combination?

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  10. Ferns and mosses resemble in possessing

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  11. In life cycle of non-vascular terrestrial plants of moist habitats, th...

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  12. How many of the following feature(s) is/are commonly concerned with Pi...

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  13. All statements are true for both ferns and conifers, except

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  14. Trimerous actinomorphic flowers, tricarpellary syncarpous ovary and fr...

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  15. Which is expressing right appropriate pairing?

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  16. Branch of taxonomy in which DNA sequences, alkaloids, crystals may hel...

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  17. The correct floral formula of Brassica campestris is

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  18. Mark the odd one (w.r.t. ploidy level in Zea mays seed)

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  19. In which of the following set of plants development of 7 celled and 8 ...

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  20. Endosperm is completely consumed by the developing embryo in

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