MCQ
Trachieds and vessels related to
- ✓Xylem
- BPhloem
- CBoth
- DNone of these
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$I$. Kranz anatomy $II$. Oxaloacetic acid $III$. Large bundle sheath cells
$IV$. Found only in desert area
$I$. 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?