Which of the following rivers flows from south to north?
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The body of all complex animals consist of only _______ basic types of tissue(s).
A newborn human baby is fed with the first secretion called colostrum from mammary gland. What does colostrum impart?
Harmful bacteria in potable water make the water
Algae belongs to which of the following levels of the ecosystem?
Which kind of cell division is used to repair an injury by the body?
Ammonium nitrate, on thermal decomposition, produces :
Non-metal oxides are usually