द्वि-निषेचन (डबल फर्टिलाइजेशन) निम्नलिखित में से किस पौधे के समूह की एक अनूठी विशेषता है?

Flowers that contain both stamens and carpels (pistils) are called .....................

Flowers are considered morphological and embryological marvels for all of the following reasons EXCEPT:

Which type of apomixis involves the embryo developing directly from diploid vegetative cells of the nucellus or integuments without fertilization?