Match the pairs. 'A' group 'B' group 1. Rhizobium a. Food poisoning 2. Clostridium b. Nitrogen fixation 3. Penicillium c. Bakery products 4. Yeast d. Production of antibiotics

1 - b Rhizobium is a nitrogen-fixing bacteria. They are associated with the formation of root nodules on plants. They take in nitrogen from the atmosphere and convert it into a usable form. 2 - a Clostridium is a genus of Gram-positive bacteria. It causes food poisoning. 3 - d Penicillium is a genus of saprophytic fungi. Some of their species produce penicillin which is used as an antibiotic that kills or stops the growth of harmful microbes inside the body. 4 - c Yeast is a microorganism. It converts sugars into ethyl alcohol and carbon dioxide gas during a fermentation process. It is used in making bakery products. 'A' group 'B' group 1. Rhizobium b. Nitrogen fixation 2. Clostridium a. Food poisoning 3. Penicillium d. Production of antibiotics 4. Yeast c. Bakery products

E M B I B E

Science and Technology Standard Nine>Chapter 8 - Useful and Harmful Microbes>Exercise>Q 4

MEDIUM

9th Maharashtra Board

IMPORTANT

Earn 100

Why are naphthalene balls kept with clothes to be put away?

Important Questions on Useful and Harmful Microbes

MEDIUM

9th Maharashtra Board

IMPORTANT

Science and Technology Standard Nine>Chapter 8 - Useful and Harmful Microbes>Exercise>Q 5

Write down the modes of infection and preventive measures against fungal diseases.

MEDIUM

9th Maharashtra Board

IMPORTANT

Science and Technology Standard Nine>Chapter 8 - Useful and Harmful Microbes>Exercise>Q 6

Match the pairs.

'A' group	'B' group
1. Rhizobium	a. Food poisoning
2. Clostridium	b. Nitrogen fixation
3. Penicillium	c. Bakery products
4. Yeast	d. Production of antibiotics