Question:
If equisetum is eg. Of Homosporous (in pteridophytes) produces similar types of spores. Then how can you say that it is the eg. Of plant having strobili as strobili is heterosporous?
Answer:
Although equisetum is homosporous pteridophyte, sometimes it produces two types of gametes - male prothallus is smaller and female one is larger. This sex differentiation depends on environmental conditions.
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