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NEET Biology QUESTION #7249
Question 1
In the prothallus of a vascular cryptogam, the antherozoids and eggs mature at different times. As a result:
  • Self-fertilization is prevented✔️
  • There is no change in the success rate of fertilization
  • There is a high degree of sterility
  • One can conclude that the plant is apomictic
Correct Answer Explanation
When male (antherozoids) and female (eggs) gametes mature at different times in the same prothallus, this is called dichogamy. Since they are not available simultaneously, self-fertilization is effectively prevented, promoting cross-fertilization and genetic diversity.