Factual
The bacterium present in curd is:
Lactobacillus
Name one communicable disease?
Chicken pox
Two types of Irrigational practices with one example of each.
1. Traditional Method
Ex.: Pulley System
2. Modern Method
Ex.: Drip Irrigation and Sprinkler System
Who discovered Fermentation and when?
Louis Pasteur in 1857
What is the Earth’s primary source of energy?
The SUN
Malaria Caused by which type of microorganisms?
Protozoa
What is food poisoning and what causes it?
Food poisoning, also called foodborne illness, is an illness caused by eating contaminated food. Infectious organisms — including bacteria, viruses and parasites — or their toxins are the most common causes of food poisoning.
While baking cakes, yeast reproduces rapidly and produces ___ gas.
Carbon dioxide
Can microorganisms be seen with the naked eyes? If not how can they be seen?
Microorganisms cannot be seen with naked eyes. They can be seen with the help of a microscope.
Gaseous planet in our solar system?
Neptune, Uranus, Saturn, and Jupiter
Cholera is caused by_______.
Bacteria
Mushroom belongs to which category of microorganisms?
Fungi
Match the organisms in Column A with their action in Column B.
Column A Column B
(i) Bacteria (a) Fixing nitrogen
(ii) Rhizobium (b) Setting of curd
(iii) Lactobacillus (c) Baking of bread
(iv) Yeast (d) Causing malaria
(v) A protozoan (e) Causing cholera
(vi) A virus (f) Causing AIDS
Column A Column B
(i) Bacteria (e) Causing cholera
(ii) Rhizobium (a) Fixing nitrogen
(iii) Lactobacillus (b) Setting of curd
(iv) Yeast (c) Baking of bread
(v) A protozoan (d) Causes malaria
(vi) A virus (f) Causing AIDS
Who first discovered the virus?
Ivanoski
Full Form of NASA?
National Aeronautics and Space Administration
Amount of nitrogen in the atmosphere is?
78%
Name the microorganisms which can fix atmospheric nitrogen in the soil.
Bacteria like Rhizobium and Azotobacter and blue-green algae can fix atmospheric nitrogen in the soil.
What do you mean by food preservation?
Food preservation prevents the growth of microorganisms (such as yeasts), or other microorganisms (although some methods work by introducing benign bacteria or fungi to the food), and slowing the oxidation of fats that cause rancidity.
Who discovered the antibiotics?
Scientist Alexander Fleming discovered antibiotics in the 1920s.
Firefox, Opera, Chrome, Safari and Explorer are types of what?
Web browsers
Where do Rhizobium bacteria commonly live?
Rhizobium is a genus of bacteria associated with the formation of root nodules on plants. These bacteria live in symbiosis with legumes. They take in nitrogen from the atmosphere and pass it on to the plant, allowing it to grow in soil low in nitrogen.
Amoeba belongs to which category of microorganisms?
Protozoa
What is Food Poisoning?
Food Poisoning- Food poisoning can be caused as a result of consumption of food spoilt by some microorganisms. Microorganisms that grow on our food sometimes produce substances that are toxic in nature. These make the food poisonous and can cause serious illness to live organisms.
Explain the Nitrogen Cycle:
Nitrogen Cycle- Some bacteria and blue-green algae present in the soil fix nitrogen from the atmosphere and convert into compounds of nitrogen. Once nitrogen is converted into these usable compounds, it can be utilised by plants from the soil through their root system. On the other hand when plants and animals die, bacteria and fungi present in the soil convert the nitrogenous wastes into nitrogenous compounds to be used by plants again. Thus due to this Nitrogen Cycle, the percentage of nitrogen in the atmosphere remains more or less constant.
Can humans breathe normally in space as they can on Earth?
No, humans cannot breathe normally in space as there is no air and oxygen as it is on earth.