Answer:
Origin of Heterospory:
The fossil evidence indicates that some sporangia of the plant contained both small and large spores, though the size differences are not so pronounced. So a single sporangium contained both microspores and megaspores. At a later period, the microsporangia and megasporangia might have been differentiated.
Explanation:
I Cant see the questions are there questions?
Answer: sería imposible la vida en este planeta ya que los gases del aire son vitales para la vida en la Tierra. los seres humanos y los animales no pueden sobrevivir sin oxígeno y las plantas verdes no pueden sobrevivir sin dióxido de carbono.
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