Question

could anybody help me with this
class 9
NCERT

Answer 1

1.A unicellular organism ,also known as single celled organism ,is an organism that consists of a single cell .

2.A multicellular organism are organisms that consist of more than one cell,in contrast to unicellular organisms.

3.Robert Hooke discoverd the cell in

1665.

4.on January 1st 1653 at Royal and

Society in London, England and the English scientist Robert hooke observed a cork slice through a primitive

compound microscope and discoverd a honeycomb structure .He coined the

term "cell"for these individual compartments he saw.

5. Cytoplasm is the substance present inside the cell.

6. Cell theory was eventually formulated in 1839.This is usually credited to

Matthias Schleiden and Theodor

Schwann.

7,8.9,10,11,12. I don't know this answer.