MCQ
Age of fossil is determined by
- AEarth crust
- ✓Remnant of radioactive carbon
- CDeposition of calcium
- DAll of the above
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$(i)$ Queen Elizabeth shows a number of haemophilic descendents.
$(ii)$ Variation in blood group prevalences due to incomplete dominance.
$(iii)$ Drosophila has three pairs of autosomal chromosomes.
$(iv)$ In birds, female is heterozygous.