Question

______________ are hollow tube-like structures that hold some archaeal daughter cells together after cell division while ____________ are grappling hook-like structures that appear to attach archaeal cells to surfaces.

1) Pili; hami
2) Cannulae; hami
3) Hami; fimbriae
4) Cannulae; pili

Answer 1

Cannulae are tube-like structures in archaea that connect daughter cells, while hami are hook-like structures for surface attachment; hence option 2, Cannulae; hami, is the correct answer.

Step-by-step explanation:

The hollow tube-like structures that hold some archaeal daughter cells together after cell division are cannulae, while the grappling hook-like structures that appear to attach archaeal cells to surfaces are known as hami. Therefore, the correct answer to the question is option 2) Cannulae; hami.

Cannulae are unique to certain archaeal species, connecting cells to form a network after division. On the other hand, hami are complex appendages resembling grappling hooks that facilitate strong adhesion to various surfaces, contributing to the formation of biofilms or colonization of substrates by archaeal cells.