(i) Lactobacilli are harmful bacteria.

Question

State whether the following statements are True or False. Explain your statement:

(i) Lactobacilli are harmful bacteria.

(ii) Cell wall of fungi is made up of chitin.

(iii) Organ of locomotion in amoeba is pseudopodia.

(iv) Tomato wilt is a viral disease.

Answer 1

(i) False.

Explanation Lactobacilli are useful bacteria. They are used for curdling the milk. They are also used for preparing variety of milk products.

(ii) True. 

Explanation The cell wall of the plants is made up of cellulose while the cell wall of fungi is made up of complex sugar called chitin. Inside the fungal cell wall there is cytoplasm which contains many nuclei.

(iii) True. 

Explanation Amoeba is a protozoan, primitive organism which possesses pseudopodia as the organ for locomotion.

(iv) True.

Explanation: Tomato wilt is a viral disease. These viruses are able to infect only plant cells.