6.a) When a farmer plants kiwi’s should he be careful to plant an equal amount of male and female trees to get fruits?
Not really, one male tree can fertilise many females, he just needs to make sure he has both male and female plants.
6.b) What type of flowers will these trees have, perfect or imperfect? Explain your answer.
Imperfect, because they only have either male or female parts.
6.c) Will all trees have fruits? Explain your answer.
No, only the female trees have the ovary which later becomes a fruit.