Typical plant growth shows _________ curve.

$\begin{array}{|p{0.3\linewidth}|p{0.6\linewidth}|} \hline Column\,\,-I & Column\,\,-II \\ \hline (p)\,\,Sponges & (I)\,\,Through\,\,tracheal\,\,tubes \\ \hline (q)\,\,Insects & (II)\,\,Through\,\,lungs \\ \hline (r)\,\,Molluscs & (III)\,\,Vascularized\,\,gills \\ \hline (s)\,\,Reptiles & (IV)\,\,Simple\,\,diffusion\,\,over\,\,their\,\,entire\,\,body\,\,surface \\ \hline & (V)\,\,by\,\,their\,\,moist\,\,cuticle \\ \hline \end{array}$

$p - q - r - s$

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Heterospory and seed habit are often discussed in relation to a structure called:

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Identify to which plant hormone, the given function belongs

$I.$ Initiates flowering in pineapples

$II.$ Induces flowering in mango

$III.$ Root growth and root hair promotion

$I, II, III$

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Which of the following forms the covering of the central nervous system of man

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