A) Ieptosporangiate
B) eusporangiate
C) heterosporangiate
D) monosporangiate
Correct Answer: A
Solution :
On the basis of involvement of cell, development of sporangia is of two types Lepto sporangiate The sporangia develops from single initial cell, which divides transversely into an outer and an inner cells. The entire sporangium develops from the outer cell. Whereas the inner cell either lumains inactive or forms the stalk of the sporangium, eg, Salvinia, Marsilea, Pteris etc. Eusporangiate The sporangium initiates from a group of superficial cells, which divide periclinally differentiating into an outer layer of jacket initial and an inner layer of primary sporogenous cells. The jacket initial eventually form the multilayered wall of the sporangium, whereas the primary sporogenous cells by repeated division give rise to spores, eg, Psilotum, Lycopodium, Selaginella and Equisetum.
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