EXERCISE 125 



In the following table, list, in the appropriate spaces, the organs or structures, tissues, etc. that are 

 distinctive of each type of plant that is, the structures present in one generation that are not to be 

 found in the alternate generation. For example, in the sporophyte of the seed-bearing plants there are 

 flowers, while there are none in the gametophyte. 



PRESENT IN SPOROPHYTE BUT NOT IN GAMETOPHYTE 



PRESENT IN GAMETOPHYTE BUT NOT IN SPOROPHYTE 



Of mosses 



Of ferns 



Of seed plants 



Questions. 1 . How does the mode of life of a moss sporophyte compare with that of a fern sporophyte ? 



2. How does the mode of life of a moss gametophyte compare with that of a violet gametophyte ? 



3. What is there in a moss plant to correspond to a flower ? 



4. How many kinds of gametophytes are there in a moss ? in a fern ? in an apple ? 



5. What is there in a tomato plant to correspond to the fruit dots of a fern ? 



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