Heterosis is
1). hybrid incompatibility
2). hybrid vigour
3). structural hybridity
4). hybrid sterility
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2. Atoms of an element differ from those of all other elements in
3. The material used in solar cells contains
5. Nucleus of an atom consists of
6. The earth wire of a cable is connected to
7. What happens when a chemical bond is formed ?
8. To make half a kilogram of honey, the nectar from how many flowers is collected by the honey bees?