I don't know, I can't understand what the question says and I speak Spanish
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.
Answer:
B. mantengan.
Explanation:
Juan y Carlos son los mejores atletas de su equipo de fútbol; ellos siempre están haciendo ejercicio. Sus entrenadores les recomiendan beber agua para que se _____ mantengan _____hidratados.
