Question
Eight nucleated female gametophyte is found in
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$\begin{array}{|p{0.3\linewidth}|p{0.5\linewidth}|} \hline Column\,\,-I & Column\,\,-II \\ \hline A.\,\,Vacuole & i.\,\,Krebs\,\,cycle \\ \hline B.\,\,Mitochondria & ii.\,\,Photosynthesis \\ \hline C.\,\,Golgibody & iii.\,\,Excretion \\ \hline D. Chloroplast & iv. Synthesis site of glycolipid and glycoprotein \\ \hline \end{array}$
$I$. Removal of $80\; \%$ tigers from an area resulted in greatly increased growth of vegetation.
$II.$ Removal of most of the carnivores resulted in an increased population of deers.
$III.$ The length of food chains is generally limited to $3$ to $4$ trophic levels due to energy loss.
$IV.$ The length of food chains may vary from $2$ to $8$ trophic levels.
Which two of the above statements are correct?