Question
What is biological control?
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What is the common name of annelids?
Expand the following abbreviations:
OPV.
Which type of connective tissue is present in hump of camel and blubber of whale?
What is present between ectoderm and endoderm of diploblastic animals?
Why amphibians are present close to the water bodies?
Identify the biogeochemical cycle.

What percent of cropped area of India is still unirrigated?
What is plant breeding?