Question

16.Which of the following plant does not undergo self pollination under any condition?

Castor
Cucumber
Papaya
All of these.​

Answer 1

Castor pollination

Even favoring geitonogamy, castor bean flowers can also set flowers by cross pollination, although in a significantly lower proportion than by selfing, but similar to the open racemes in the area without honey bee introduction and those covered with muslin bags and pollinated by the wind.