Directions : In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the code:
Which of the following pairs are correctly matched? (1) Fertile spike?Ophioglossum (2) Sporangiophore?Equisetum (3) Synangium?Psilotum (4) Apophysis?SpirogyraA) 1, 2 and 3 are correct
B) 1 and 2 are correct
C) 1, 2 and 4 are correct
D) 1 and 3 are correct
Correct Answer: A
Solution :
Fertile spike?Ophioglossum reproduces by means of spores which are formed within sporangia. The latter are borne on a fertile \segmeni which projects from the leaf near the junction of the petiole and lamina. This sporangiferous fertile segment is known as fertile spike. Sporangiophor?Equisetum is a homosporous pteridophyie. The spores develop within sporangia borne on sporangiophores which are aggregated into a compact cone or strobillus. Synangium?Pstlotum. reproduces by means of spores produced in sporangia borne at the distal end of the dichoiomously branched aerial shoot. Sporangium is a triiobed structure in which each lobe has a spore sac with numerous spores. Such a sporangium formed by a group of two or more spore sacs is called synangium.
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