The main job of a leaf is to make
food
carbon dioxide
energy
chlorophyll

It may have some of the same features that it’s mother does but, it may have some of the same features that it’s father has as well.

When a virus infects a host cell, it uses the cell's machinery to make copies of its own genetic material in a process called replication. finally, during the process of self-assembly, that protein shell and the copies of the virus's genetic material are assembled into new viruses.