Answer:
They are parasitic.
They are not a roundworm.
Leeches lack setae.
Yes they do have medical uses.
Yes leeches are segmented.
Sorry if I am wrong
Acceleration of a body is defined as rate of chance in velocity with respect to time and its S.I. Units are
/ or 
Magnitude of average acceleration of a body = (final speed - initial speed)/time interval = 
where, final speed =v= 11 m/s; initial speed = u = 6 m/s; and time interval = t = 3 s
Hence acceleration =
=
= 
It is a plant cell, because it is part of the plant, the rose, it is attached to.