Question

make a list of any three outbreeding devices that flowering plants have developed and explain how they help to encourage cross pollination ?

Answer 1

hyperstyly
style is much longer than stigma .
herpogamy
a mechanical device used to prevent cross pollination.
protoandry
maturation of anther is much earlier than stigma.
protogyny
maturation of stigma is earlier than anther.
self incompatibility
ability of stigma to not germinate its own pollen