Question

19. Let S CR. A point x e R is said to be a boundary point of S if every
neighbourhood N(x) of x contains a point of S and also a point of R - S.
If a boundary point of S is not a point of S prove that it is a limit point
of S. Prove that a set SCR is closed if and only if S contains all it boundary
points.​

Answer 1

Answer:

A tissue is a group of connected cells that have a similar function within an organism. There are four basic types of tissue in the body of all animals, including the human body. These make up all the organs, structures and other contents of the body. figure below shows an example of each tissue type.