Probably a hinge joint or a tendon.
Answer:
Diffusion
is the movement of molecules from an area where there are many to an area where there are few
Hope it helps
The answer is an envelope.
A virus is an infectious agent that can replicate only inside a host cell. When it is outside the cell, it consists of genetic material coated with protein capsid. Some viruses also have an envelope which covers capsid. The function of the envelope is to identify and bind some receptor sites on the host membranes. After fusing with the cell membrane, it allows to capsid and genetic material to enter the cell and infect it.
Drilling with pipe and mud
The answer is A. Chemosynthetic bacteria
