Yes most of them do. That is one of the main reasons why dogs get spayed/neutered. In order to give birth, You need to of had your period first. So the animals that can give birth have a period. I don't know how long it is though. I am also not sure about fish, just mammals.
Salt is separated by adding heat to the boiling point. (To separate salt and water)
Answer:
FV- 0 m/s
IV- 3 m/s
t- 2 sec
A= FV-IV/t
A= 0-3/2
a= -1.5 m/s²
Explanation:
FV- Final Velocity -> m/s
IV- Initial Velocity -> m/s
A- Acceleration -> m/s²
t- time -> seconds
C. respiratory and circulatory system
Air has no fixed volume and fixed shaped.