Question 14 Marks
Write the names of four groups of bacteria on the basis of shape. Name any four diseases caused by bacteria and draw any two picture of bacteria.
3 questions · self-marked practice — reveal the answer and mark yourself.
| Bacteria | Cynobacteria |
| (i) Small cells. | (i) Relatively large cells. |
| (ii) There may be flagella. | (ii) There are no flagella. |
| (iii) Photosynthesis in some bacteria (green bacteria) happens in a different way, in which oxygen comes out. | (iii) In photosynthesis, oxygen is released in the usual way as happens in green plants. |
| (iv) Sexual reproduction by conjugation. | (iv) Conjugation was not observed. |
| Algae | Fungi |
| (i) Algae have chlorophyll and autotrophic. | (i) Fungi are heterotrophic and lacks chlorophyll. |
| (ii) Their cell wall is made of cellulose. | (ii) It is made from chitin. |
| (iii) Thallus is made of fibrous or true parenchyma. | (iii) It consist of long, slender thread-like structures called hyphae. The network of hyphae is known as mycelium. |
| (iv) Stored food items are in the form of starch. | (iv) Stored foods are in the form of oil and glycogen. |
