Asexual- having no apparent sex or sex organs. both parents needs, seeds formed.
sexual- having apparent 
sex or sex organs. one parent needs, no seeds formed.
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Sexual is where presence of 2 parents of different sexs is important and asexual is where only one parent is required...........If ur question is sexual reproduction and asexual reproduction then u may well understand that in sexual reproduction two parents are involved and vice -versa for the other.
got it??
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