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The spread of living pteridophytes is li...

The spread of living pteridophytes is limited and restricted to narrow geographical regions. Why?

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The correct Answer is:
because they need water for fertilization
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ALLEN -DIVERSITY OF THE LIVING WORLD-Exercise
  1. In bryophytes, zygotes do not undergo reductino division immediately. ...

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  2. Find the ploidy level of followings with respect to bryophytes:- A-G...

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  3. In bryophytes, the dominant phase in the life cycle is the plant body...

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  4. Which part of gametophytic plant body of mass bears sex organs-antheri...

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  5. Identify the following figures (A,B):-

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  6. How many of the following have heterosporous nature? Selaginalla, Eq...

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  7. Read the following informations and identify the genus * Coralloids ...

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  8. The spread of living pteridophytes is limited and restricted to narrow...

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  9. Female cone to Mega sporophylls to Megasporongia to Megaspores For a...

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  10. Identify the name of processes (A&B) in the given sequence Microspor...

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  11. In gymnosperms, the male and the female gametophytes do not have an in...

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  12. Write the names of male and female sex organs of angiosperms respectiv...

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  13. In how many classes angiosperms are divided?

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  14. Ovules, stamen, ovary, carpel, anther, antipodals, synergids, Pollen g...

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  15. Angiosperms range in size from tiny, almost microscopic e.g. (A) to ta...

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  16. How many nuclei are involved in double fertilization?

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  17. Which kind of life cycle pattern is shown by all seed-brearing plants?

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  18. The life cycle of any sexually reproducting plant, there is an alterna...

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  19. In bryophytes, the dominant phase in the life cycle is the plant body...

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  20. Algae usually reproduce vegetatively by (A) asexually by formation of ...

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