Interneurons play an important role in the execution of spinal cord-mediated reflex action. Where are these interneurons located?

Osmoreceptors are sensitive to changes in ionic concentrations and volumes of body fluids. Which among the following best describes the function of these osmoreceptors?

A single point mutation in gene ' $X$ ' results in breathing difficulty, hypertension as well as partial sterility. Which among the following best explains the observed phenotypes?

In a cross between individuals of the genotypes PpQQRrSS and ppqqRrSS, what will be the expected number of progenies with the genotype ppQQRrSS in a population of 400 individuals, assuming independent assortment?