पेरिस्पर्म (जिसे विशिष्ट संदर्भों में चैलाजोस्पर्म भी कहा जाता है) बीज में निम्नलिखित में से किस संरचना का एक स्थायी अवशेष 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?