Fill in the blanks with suitable words :

1. Inside the nucleus, there is a small, spherical, darker body called …………… .
2. The plastids which do not contain any pigment are called …………… .
3. Cell wall is composed of …………… .
4. …………… contain yellow and red pigments.
5. The process of preparing food by the plants is known as …………… .

Identify the cellular structures with the help of the following clues :

1. It is a colourless, translucent, viscous liquid found between the cell membrane and nuclear membrane.
2. It contains chromosomes.
3. It traps solar energy for the process of photosynthesis.
4. The selectively permeable, thin, delicate and flexible membrane.
5. The hereditary unit which is located on the chromosomes.

Name the scientist who invented the first microscope?

Who coined the term "cell"?