| Consider the following statements. |
| I. Lichen is a composite organism formed from the symbiotic association of an alga and a protozoan. |
| II. The sporophyte in Riccia is more developed than that in Polytrichum. |
| III. Gymnosperms are also called softwood spermatophytes because they lack xylem fibres, |
| IV. Which of the statements given above are not correct? |
A) I, II and III
B) I and III
C) II and III
D) I and II
Correct Answer: D
Solution :
Lichens are peculiar dual organisms produced by the association of two organisms of fungus and an alga. The association between the two organsisms is symbiosis. Riccia is a liverwort and Polytrichum is a moss. The sporophyte in mosses is more elaborate than that in liverworts.
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