All species started from one thing before branching off and changing their genetics, slowly, as time progressed; this is the process of evolving. Most times it has an effect on physical characteristics as well.
They will likely be wiped out as well, since if the fungus can wipe out some of the Cavendish bananas, they will be likely to be able to wipe out the rest since they all share the same genes. Since they all share the same genes they will have the same weaknesses the fungus can exploit
egg whites
While it may seem daunting, a basic meringue is nothing more than a mixture of beaten egg whites and sugar.
If you broke a piece of matter into its smallest components, you would be left with Atom. Atom is the smallest unit of matter.
An organism produced by asexual reproduction would more closely resemble its parent because an organism produced through asexual reproduction is created by the parent duplicating its genetic code and separating into two. Essentially the child is a duplicate.
