problem 1: What are the three main points of the cell theory?

problem 2: Who are the four people considered to be the most significant in the development of the cell theory and what did they do?

problem 3: On what basis can we assume that animals and plants might have had a common ancestor?

problem 4: Fill up the blanks:

a) The mode of nutrition of an organism which consumes other organisms is a/an ________.

b) Plants should use _____________ to carry out the photosynthesis.

c) Animal cells encompass _____________ for breaking down food.

d) The cell ____________ is the outer layer of an animal cell.

e) An organism which uses light to make food employs a mode of nutrition termed as ______.

f) The first person to view living cell was ____________.

g) _________ and _________ proposed the cell theory.