Class VII SCIENCE CHAPTER 1- CELL- THE BUILDING BLOCKS OF LIFE- EXTRA QUESTIONS.

1.            Name the type of cell in which nucleus is absent.

2.            What is the function of chloroplasts in plant cells?

3.            On which factor does size of an organism depends in eukaryotic organisms. Cell shape or number of cells and why?

4.            Why the nerve cells are branched in shape?

5.            What is the function of cell membrane in the cell?

6.            How can we say that a cell is capable of independent existence?

7.            What is tissue?

8.            Which of the following organisms have cell wall.

     (1)Bacteria         (2) Plants     (3) Amoeba (4) Human beings

9.            Name the cell organelles present in typical eukaryotic cells.

10.        How did the term 'cell' came into existence?

11.        Differentiate prokaryotic and eukaryotic cell.

12.       Write 2 functions of stem cells.

13.        Give reason: Many people store the stem cells of the new born child into banks.

14.        Differentiate red blood cells and nerve cells on the basis of

a) structure

b) function

15.        Fill in the blanks-

a) Size of the smallest cell is ____________________micrometer.

b) Largest cell measures around ___________________cm.

c) In multicellular organisms, there is ______________ of __________ among specialised cells.

d) ____________ and ______________ cells change their shape as per requirement of the organism.