Microorganisms Friends and Foe Worksheet-7

Microorganisms Friends and Foe Worksheet-7

1. Which of the following is matched cor­rectly in the table given below?

(a) I only                                         (b) I and II only

(c) I and III only                           (d) II and III only

2. Which useful microorganisms and their activities are correctly matched?

(a) I only                                         (b) I and II only

(c) I and III only                           (d) I, II and III

3. Which statement on pathogens is true?

(a) All pathogens are non-parasitic

(b) All microorganisms are pathogens

(c) All pathogens are harmful to humans

(d) All pathogens are beneficial to humans

4. Which of the following are represented by P, Q, R and S in figure given below:

(a) P-Diatom, Q-Chlamydomonas, R- Spirogyra, S-Volvox

(b) P-Volvox, Q-Chlamydomonas, R-Spirogyra, S-Diatom

(c) P-Volvox, Q-Diatom, R-Spiro­gyra, S-Chlamydomonas

(d) P-Spirogyra, Q-Volvox, R-Dia­tom, S-Chlamydomonas

5. Name the microorganism shown in the figure given below.

(a) Virus            (b) Fungus        (c) Bacterium   (d) Protozoan

6. Which of the following is represented by 'X' in the figure given below?

(a) Protozoa      (b) Bacteria       (c) Viruses         (d) Algae

7. The largest bacteria is of which type?

(a) Bacillus        (b) Coccus         (c) Spirillum     (d) Spherical

8. Which of the following substances are produced by an organism to prevent or reduce the spread of microorganisms?

I – Antiseptics

II – Antibiotics

III – Antibodies

(a) I and II only                             (b) II and III only

(c) III only                                      (d) II only

9. These organisms have an ability to help in recycling of nutrients and energy. Which organisms are these?

(a) Bacteria       (b) Diatoms      (c) Virus             (d) Fungi

10. ‘Spirogyra' differs with a 'paramoecium' in the presence of:

(a) mitochondria                          (b) golgi bodies

(c) nucleus                                     (d) plastids

Answer Key:

(1)-(c); (2)-(b); (3)-(c); (4)-(a); (5)-(b); (6)-(c); (7)-(a); (8)-(c); (9)-(a); (10)-(d)