Which one of the following generates new genetic combinations leading to variation?
Vegetative reproduction
Parthenogenesis
Sexual reproduction
Nucellar polyembryony
Pair of chromosomes in maize
........and..........is example showing external fertilization
Monoecious plants means.
Identify the events $(A, B, D$ and $E)$ in life of general reproduction
$A$ - In several fungi and plants terms such as Homothalic.
$R$ - Dioecious are the terms used to describe unisexual condition.