C. Very Short Answer Type Questions 1. Which microbe causes curdling of milk? 2. Which microbe converts sugar solution into alcohol? 3. Which bacterium causes spoilage of canned food? 4. Which microbe causes tobacco mosaic disease? 5. Which microbe forms cottony mass on a moist bread slice?
D. Short Answer Type Questions 1. Name the five groups into which microorganisms are divided. Which groups of microbes have only single-celled individuals? 2. Why are viruses considered the connecting link between the living and the nonliving things? 3. What causes food poisoning? 4. What are communicable diseases? Name four communicable diseases.
Answers
Answer:
1=Lactobacillus
2=yeast
3=Mesophilic Clostridium Species
4=TOBACCO MOSAIC VIRUS
5=bread mould
Explanation:
D
1=Viruses, Bacteria, Archaea, Fungi, and Protists.
Protists. The protists are a very varied group consisting of all the eukaryotes that are not fungi, plants or animals. Most are unicellular and include plant-like algae, animal-like protozoa and fungi-like slime molds.
2=Because they are not alive in the way we understand it : they have no metabolism and living cycle on their own. They don’t feed, they don’t have breathing metabolism, they have no reproduction on their own, they don’t have cellular structure ….
However they reproduce themselves in host cells which is one key element to define life.
So basically they have one feature of life but are lacking all the others
3=Food poisoning takes place when the individual eats contaminated food and in many cases, the food is adulterated by bacteria or viruses or parasite but in most common cases, the food is contaminated by bacteria. The causative bacteria of food poisoning include Listeria, Salmonella, and E. Coli.
4=Microbial diseases that can spread from an infected person to a healthy person through air, water, food or physical contact are called communicable diseases. Examples of such diseases include cholera, common cold, chicken pox and tuberculosis.