MCQ
Which of the following would necessarily decrease the density of a population in a given habitat?
- ANatality > mortality
- BImmigration > emigration
- CMortality and emigration
- DNatality and immigration
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$I.$ Haemophilia is a sex-linked recessive disease
$II.$ Down's syndrome is due to aneuploidy
$III.$ Phenylketonuria is an autosomal dominant gene disorder
$IV.$ Phenylketonuria is an autosomal recessive gene disorder
$V.$ Sickle cell anaemia is an $X$-linked recessive gene disorder