Question

I. In Rhodophyceae, food is stored as mannitol and laminarin. II. Ovules of gymnosperms are not enclosed by ovary wall. III. Salvinia is heterosporous. IV. In diplontic life cycle, free living gametophyte represents dominant phase. Of the above statements.

• A. II and III are correct, I and IV are wrong
• B. II and IV correct, I and III wrong
• C. III and IV correct, I and II wrong
• D. I and II correct, III and IV wrong
• E. I and IV correct, II and III wrong

Answer 1

The correct option is A II and III are correct, I and IV are wrong

• In Rhodophyceae, food is stored as floridean starch.
• Genera like Selaginella and Salvinia which produce two kinds of spores, macro (large) and micro (small) spores, are known as heterosporous.
• The sporophyte is the dominant, photosynthetic, independent phase of the plant. The gametophytic phase is represented by the single to the few-celled haploid gametophyte. This kind of life cycle is termed as diplontic.
• The gymnosperms (gymnos: naked, Sperma: seeds) are plants in which
  
• the ovules are not enclosed by any ovary wall and remain exposed, both
• before and after fertilization. Hence, II and III are correct, I and IV are wrong.
• So, the correct answer is "II and III are correct, I and IV are wrong'.