Question

A.Fill in the blanks.
1. Bacteria and ———---------------- are some of the common decomposers.
2. Harmful materials released by microorganisms in our body are called ———-.
3. Smut of ———— and red rot of ————— is a fungal disease.
4. Sodium ——— and Potassium ———- are used to preserve——-, —— & pickles.
5. Dogs get infected with this virus disease called ———— ————.
B.State whether these statements are True or False.
1. Both humans and cattle get infected by tuberculosis and ringworm. ————-.
2. Tetanus and typhoid are diseases caused by viruses. ————-.
3. Microorganisms produce ethanol by fermentation of sugars. ————-.
4. Chlorella and Spirogyra are protozoans. ————-.
5. Vacuum packing used for storing nuts deprives bacteria of oxygen. ————-.
C.Match the following.
1. Citrus canker Orange patches
2. Antibody. Bioaugmentation
3. Clostridium Bacterial disease
4. Rust of wheat Destroy bacteria
5. Sewage treatment Bad odour & taste
6. Rancidity. Cattle disease
7. Anthrax. Food poisoning
D. Give reasons for the following.
1. Food kept in the open by hawkers should not be consumed.
2. Vacuum packing is commonly used to store nuts.
3. Stems of sugarcane show dull red colour along with White patches on stalks.
4. Common cold and conjunctivitis are communicable diseases.
5. Microorganisms can help in the production of fuel for energy.
E. Choose the correct options.
1. Mumps is a ——- disease.
a. Bacterial
b. Virus
c. Protozoan
d. Fungal
2. Which of these can be prevented by vaccination?
a. Tetanus
b. Polio
c. Measles
d. All of these
3. Which of the following are methods of preservation?
a. Canning
b. Freezing
c. Vacuum packing
d. All of the above
4. Which of these are protozoans?
a. Euglena
b. Spirogyra
c. Paramoecium
d. a & c both
5. The special cells produced in response to a disease causing microbe are called
a. Antigens
b. Antibodies
c. Immunity
d. None of above
6. These are diseases caused by bacteria
a. Cholera
b. Typhoid
c. Tetanus
d. All of these
7. Which of these diseases get transmitted through animals?
a. Tetanus
b. Rabies
c. Malaria
d. Typhoid
F. Do some research and find out more about the SARS virus.
Are there any similarities between SARS and Covid-19 virus? Which one of th

Answer 1

Answer:

bacteria and fungi are decomposers

Answer 2

Answer:

1. Bacteria & fungi are some of the common decomposers. Harmful materials released by microorganisms in our body are called microbial

2.pathogens

3.Red rot is a very serious disease of sugarcane. ... The surest symptom of the disease is the reddening of the internal internodal tissues with crossbars of white patches in the reddened area. This red colour is caused by a dye which is secreted by the host and is antagonistic to the red rot fungus