No idea but hopefully this cheers you up!
Explanation:

Seed formation without fertilization in flowering plants involves the process of ---
A) APOMIXIS
Answer:
Possession of inherited adaptations that maximize fitness.
Explanation:
Basically ones that are best adapted for their environment. (I'm assuming "he" is Darwin?)
Crossing over occurs at the four-strand stage when two homologous chromosomes, each consisting of a pair of sister chromatids, are paired. Each crossover involves just two of the four strands and generates two recombinant strands.
Hope this helps!
Endo = enter
This means when things enter into the cell, I hope this helped