MCQ
Exponential population growth is represented by
- ✓$ dN/dt = rn $
- B$dt/dN = IN $
- C$N/IN = dt$
- D$rN/dN = dt$
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$I$. 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?
$(a)$ Using sterile needles
$(b)$ Transfusion of blood from infected person
$(c)$ Infected mother to foetus
$(d)$ Kissing
$(e)$ Inheritance
Choose the correct answer from the options given below.