Heterosis (Hybrid vigour) is desirable in vegetatively propagated plants because:
1.  Heterosis is maintained for a longer duration
2.  These plants are easy to cultivate
3.  Vegetative reproduction help to multiply fast
4.  It is due to homozygosity

During regeneration, the modification of an organ to another organ is known as:
1.  Morphallogenesis
2.  Epimorphosis
3.  Morphallaxis
4.  Accretionary growth

The chief advantage of encystment to an Amoeba is: 

In which one of the following pairs, both plants can be vegetatively propagated by leaf pieces:
1. Bryophyllum and Kalanchoe
2. Agave and Kalanchoe
3. Asparagus and Bryophyllum
4. Chrysanthemum and Agave