In an experiment, a group of plants fail to reproduce when water is withheld, even though they have vascular tissues. Which plant group do they most closely resemble?
Pteridophyta
Pteridophyta are the first vascular plants: they have xylem and phloem, so they conduct water like higher plants, but their reproduction still depends on external water. Their sperm are flagellated and must swim through a film of water to reach the egg, so if water is withheld fertilisation cannot happen.
Angiosperms and gymnosperms are seed plants whose pollen is transferred by wind, insects or animals, so lack of water does not stop them from reproducing. Bryophytes also need water for fertilisation, but they are non-vascular; the plants in the experiment do have vascular tissue, so they resemble pteridophytes, not bryophytes.
Hence, the answer is Pteridophyta.
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Select the hierarchy (descending) of the taxonomic ranks using the codes given below:
A. Order
B. Genus
C. Class
D. Species
E. Family
Codes :
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Mycology is related to the study of-
Nutritionally Albugo is
