Question

why does hibiscus not bears fruits even though androecium and gynoecium present in it

Answer 1

this is because if it is form it will not look like their parents hence hibiscus does not bears fruit

Answer 2

because the fruit of the hibiscus flower is the five lobed pod or capsules just below the flower. The lobs of pods contain seed like any other fruit. So, the hibiscus plant does not have any distinct fruit.