Last updated on December 14th, 2023 at 08:02 am
Which plants commonly form a symbiotic relationship with Rhizobium bacteria?
- a) Grasses
- b) Trees
- c) Ferns
- d) Leguminous plants
Answer: d) Leguminous plants
What is the process of converting atmospheric nitrogen gas into nitrogen compounds called?
- a) Nitrogen fixation
- b) Nitrogen respiration
- c) Nitrogen synthesis
- d) Nitrogen absorption
Answer: a) Nitrogen fixation
What is the circulation of nitrogen between living things and the non-living environment called?
- a) Nitrogen fixation
- b) Nitrogen respiration
- c) Nitrogen cycle
- d) Nitrogen synthesis
Answer: c) Nitrogen cycle
The plant disease called ‘rust of wheat’ is caused by …….
- Virus
- Algae
- Fungi
- Bacteria
Answer: Fungi
Dengue is caused by a……………
- Virus
- None of These
- Protozoa
- Bacteria
Answer: Virus
Scientists who study microorganisms are known as ………
- Pedologist
- None of These
- Microbiologist.
- Ornithologist
Answer: Microbiologist
Malaria is caused by ………….
- Protozoa
- None of These
- Bacteria
- Virus
Answer: Protozoa
The insect which transmits disease-causing micro-organisms to humans is called a ……….
- Transmitter
- Carrier
- Messenger
- None
Answer: Carrier
The antibiotic ‘penicillin’ was discovered ‘Penicillium’ which is a ………….
- Fungus
- None of These
- Bacteria
- Algae
Answer: Fungus
The plant disease called ‘citrus canker’ is caused by …….
- Virus
- Bacteria
- Fungi
- Algae
Answer: Bacteria
Bacteria and fungi are used to make medicines called……….
- Vitamins
- Antibiotics
- Vaccines
- None
Answer: Antibiotics
Spiral-shaped bacteria are called ………
- Spirilla
- Bacilli
- Cocci
- None of These
Answer: Spirilla
The study of microorganisms is known as ………
- Pedology
- None of These
- Microbiology.
- Ornithology
Answer: Microbiology
The plant disease called ‘yellow vein mosaic of OKRA (bhindi)’ is caused by a ………
- Virus
- None of These
- Bacteria
- Protozoa
Answer: Virus
Rod-shaped bacteria are called ……….
- Cocci
- None of These
- Spirilla
- Bacilli
Answer: Bacilli
Who discovered the bacteria Bacillus anthracis which causes anthrax disease in animals in 1876?
- Robert Koch
- Louis Pasteur
- Oswald Avery
- None of These
Answer: Robert Koch
Microorganisms have a hard outer covering called ………
- Cyst
- None
- Bark
- Chitin
Answer: Cyst
Spherical-shaped bacteria are called …….
- Cocci
- Spirilla
- None of These
- Bacilli
Answer: Cocci
Edward Jenner discovered the vaccine for …………. in 1798.
- Polio
- Rabies
- Smallpox
- Varicella
Answer: Smallpox