Biology
Vinita has gone to her grandparents' home situated in a'coastal village'. While visiting, she noticed that several fruits have fallen on the muddy shore. Unlike the seeds she had seen in other plants, these fruits already had long, green shoots emerging from them. Vinita observed that the already-sprouted seedlings easily anchored themselves in the soft mud, preventing them from being washed away by the tides.
(a) Mention the special mode of seed germination seen by Vinita in some plants of the coastal area.
(b) What specific term is used to describe such plants in which the seed germinates inside the fruit itself?
(c) Give two examples of the plants described above in (b).
(d) Which part of the embryo appears much elongated during the above mentioned germination in (a) ?
(e) How are these seeds adversely affected if they fall directly onto the marshy land ?
Seeds
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Answer
(a) The special mode of germination seen is vivipary.
(b) Plants in which the seed germinates inside the fruit itself are called viviparous plants.
(c) Two examples of the plants described above are Rhizophora and Sonneratia.
(d) The part of the embryo that becomes elongated is the hypocotyl.
(e) If these seeds fall directly onto marshy land before developing sufficiently, they may not get enough oxygen, may decay or may be washed away by tides before proper anchorage.
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