1.5 Fill in the blanks with suitable words

Animal Cell

All animal cells are multicellular. They are ______cells. Animal cells are surrounded by _______membrane and it contains the _______and organelles that are membrane bound.

Animal cells are of various sizes and have irregular______. Most of the cells size range between 1 and 100 micrometers and are visible only with help of microscope. Trillions of cells are found in the human body. There are many different types of cells, _______210 distinct cell types in adult human body.

(Approximately, eukaryotic, nucleus, plasma, shapes)

Plant Cell

Plant cells are ______cells or cells with _______bound nucleus. Generally, plant cells are larger than animal cells and are mostly similar in ______and are rectangular or cube shaped. Plant cells are similar to animal cells in being eukaryotic and they have similar cell ______.

The most important distinctive structure of plant cell is the presence of the ______ outside the cell membrane. It forms the outer lining of the cell. The cell wall mostly consists of ______and its main function is providing support and rigidity. Plants cells also contain many membrane bound ______structures. These organelles carry out specific functions necessary for survival and normal operation of the cells. There are a wide range of operations like producing _______, enzymes, and all metabolic activities of the cell.

Size, cellular, eukaryotic, cell wall, organelles, hormones, cellulose, membrane

1.6 Complete the sentences

1. The cell's structure has not yet been fully understood because ____________.

2. Antoni van Leeuwenhoek was the first _______________.

3. According to the cell theory cells are _______.

4. In our bodies there are about _________.

5. Cells perform different tasks, though ____________.

6. Blood cells transport __________.

7. The size of bacteria is __________.

8. Bacteria have the following forms: _____________.

9. Prokaryotes are ___________.

10. Eukaryotic cells have ______________.

11. Prokaryotic cells do not have ____________.

12. Eukaryotic cell type has __________.

13. Prokaryotes consist of ____________.

14. Plasma Membrane is ____________.

15. Most prokaryotes reproduce ____________.

16. Eukaryotic cells consist of _____________.

17. Chromosomes are located ____________.

1.7 Answer the following questions

1. What are organisms made up from?

2. What do cells form?

3. Are the cells fully understood?

4. How many cells does every adult human body contain?

5. What does the cell theory state?

6. How many types of cells are there in our bodies?

7. Why are Prokaryotes much simpler than the eukaryotic cell?

8. How are functional compartments divided?

9. What don’t Prokaryotic cells have?

10. What is a eukaryotic cell compared with?

11. What does Plasma Membrane do?

12. How are most prokaryotes reproduced?

13. What is binary fission?

14. What do Eukaryotic cells contain?

1.8 Summarize the text

II From the history of a microscope

Anton van Leeuwenhoek Robert Hooke