5. How does foot and mouth disease spread in cattle?
G. Answer the following questions in brief.
1. What are antibiotics? Give two examples.
2. How does Rhizobium help in improving soil fertilit
3. Why are viruses called the bridge between living
4. How do protozoans move?
5. How can we prevent the spread of malaria?
H. Answer the following questions in detail.
1. Explain the principle behind vaccination.
How do diseases spread? Explain with any two
nitrogen cycle.
2.
Answers
Answer:
brother mujhe iska answer nahin pata hai tune mere ko follow nahi kiya hai aur Abhi Tum bolo Karega to mein kaun sa bata dunga jaldi bata jaruri hai tu
Answer:
5. FMD is a viral disease that spreads rapidly between animals. Virus is excreted in breath, saliva, mucus, milk and faeces. The virus can be excreted by animals for up to four days before clinical signs appear. Animals can become infected through inhalation, ingestion and direct contact.
G
1. Antibiotics is a chemical secreted by microorganisms that kills or hunder the growth of some kind of bacteria.
example-- Penicillin and streptomycin
2. Rhizobium is a bacterium found in soil that helps in fixing nitrogen in leguminous plants. It attaches to the roots of the leguminous plant and produces nodules. These nodules fix atmospheric nitrogen and convert it into ammonia that can be used by the plant for its growth and development.
3. viruses are non-living things out side the body of any organism but reproduce once it enter in a host. Viruses are non-living when they are outside the host cell as they don't have any cellular machinery of their own. ... That's why they are considered as link between living and non-living.
4. They are motile and can move by: Cilia - tiny hair like structures that cover the outside of the microbe. They beat in a regular continuous pattern like flexible oars. Flagella - long thread-like structures that extend from the cell surface.
5. Bite prevention – avoid mosquito bites by using insect repellent, covering your arms and legs, and using a mosquito net. Check whether you need to take malaria prevention tablets – if you do, make sure you take the right antimalarial tablets at the right dose, and finish the course.
H
1. To produce an immune response, live attenuated vaccines must replicate (grow) in the vaccinated person. A relatively small dose of virus or bacteria is administered, which replicates in the body and creates enough of the organism to stimulate an immune response.
2. The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmosphere, terrestrial, and marine ecosystems. The conversion of nitrogen can be carried out through both biological and physical processes.