CBSE 2024 · Region 1 · Set 1 · Q20 · 2 marks
A farmer while working on his farm was bitten by a poisonous snake. He was rushed to a nearby health centre where the doctor gave him an injection to save his life.(i)What did the doctor inject and why ?(ii)Name the kind of immunity provided by this injection.Why do organic farmers not recommend complete eradication of insect pests? Explain giving reason.
A farmer while working on his farm was bitten by a poisonous snake. He was rushed to a nearby health centre where the doctor gave him an injection to save his life.
(i)
What did the doctor inject and why ?
(ii)
Name the kind of immunity provided by this injection.
Why do organic farmers not recommend complete eradication of insect pests? Explain giving reason.
Marking-scheme solution
(a)
-Readymade or preformed antibodies or antitoxins against the snake venom ,
-A quick immune response is required in this case.
(ii)
Passive immunity
The organic farmers hold the view that complete eradication of pests is not only possible
but also undesirable because without them beneficial predatory and parasitic insects which depend upon them as food or hosts will not survive /
One of the key belief of organic farmers is that biodiversity furthers health. Greater biodiversity leads to more sustainable ecosystem.
Human Health and DiseaseImmunityUnderstandvery_short_answermedium
More from Human Health and Disease
- Name the category of drugs represented by the chemical structure given above. If the methyl group is…2023 · asked 3×
- Lactobacillus that sets milk into curd is categorised as:2024 · asked 3×
- Explain, giving two reasons, how immune response by "vaccine" is different from that by "antitoxin" in humans.2022 · asked 3×
- Student to attempt either option or. Describe any two situations where a medical doctor would recommend…2025 · asked 3×
- (i) Draw the structure of an antibody molecule and label any four of its parts. (ii) Differentiate between…2026 · asked 3×
- Assertion: Virus-infected cells produce interferons. Reason (R): Interferons can cause inflammation of…2024 · asked 3×
- Out of the following, select the correct match:2025 · asked 3×
- Though filariasis is not fatal, but the disease in humans is responsible for considerable suffering, gross…2022 · asked 3×
CBSE Class 12 Biology past-paper question from the 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.