MCQ
In the immune system, interferons are a part of
- APhysiological barriers
- BCellular barriers
- CPhysical barriers
- DCytokine barriers.
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$(a)$ Population density is necessarily measured in numbers
$(b)$ Tiger census is often based on pug marks and fecal pellets
$(c)$ Biomass is not a meaningful measure to know population size.
$(d)$ Size of a population for any species is not a static parameter
$(A)$ Linked genes cause absolute lethality
$(B)$ Persons affected by $PKU$ do not show mental disorder
$(C)$ $F_{2}$ ratio in codominance and incomplete dominance are same
$(D)$ Sex of male Drosophila is dependent on $Y-$chromosome