Answer correctly.
(1) How does the vaccine help to prevent disease?
(2) Why do birds migrate?
(3) Which irrigation system is useful in water scarcity area? Why
Answers
Answer:
Answers
1)Vaccines help your immune system fight infections faster and more effectively. When you get a vaccine, it sparks your immune response, helping your body fight off and remember the germ so it can attack it if the germ ever invades again.
2)Migratory birds fly hundreds and thousands of kilometres to find the best ecological conditions and habitats for feeding, breeding and raising their young. When conditions at breeding sites become unfavourable, it is time to fly to regions where conditions are better. There are many different migration patterns.
3)Benefits of drip irrigation
Since it supplies water directly to the crop, rather than the land around, water losses occurring through evaporation and distribution are significantly reduced. The on-farm efficiency of the drip irrigation system is estimated to be over 90 per cent; it is only 35-40 per cent for FMI.
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