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Write any four characters of pteridophytes.
 
a. Pteridophytes are the  with vascular tissues.
 
b. The main plant body of the pteridophytes plants is .
 
c. Pteridophytes  . During their life cycle, the diploid sporophytic phase alternates with the .
 
d. In pteridophytes, the sporophyte is the . The sporophytes reproduce through the spores that are produced in the sporangium. The sporangia that bears leaves are known as .
 
e. The majority of the  pteridophyte plants are classified as  as they produce only one type of spore, i.e., either microspore or megaspore. However, in some plants, both the spores are produced. These type of plants are known as .