I believe it would be polyphyletic.
Polyphyletic groups are formed when two lineages convergently evolve similar character states. Organisms classified into the same polyphyletic group share phenetic homoplasies as opposed to homologies. The key difference between paraphyletic and polyphyletic groups is that paraphyletic contain their common ancestor, whereas polyphyletic groups do not.
They do so by surrounding or attacking the wall with bacteria
It depends whether that mutant gene is dominant or not
People in a secondary group interact on a less personal level than in a g. Since secondary groups are established to perform functions, people’s roles are more interchangeable. A secondary group is one you have chosen to be a part of. They are based e where many people can meet close friends or people they would just call acquaintances. Secondary groups are groups in which one exchanges explicit commodities, such as labour for wages, services for payments, etc. Examples of these would be employment, vendor-to-client relationships, etc.The distinction between Primary and Secondary groups serves to identify between two orders of social organization through analysis of the group relationships and their nature.