How much percentage of absorbed water is used in photosynthesis
$1\%$
$5\%$
$10\%$
$90\%$
Which of the following are consumers of second order
Consider the following statements concerning food chains.
$I$. 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?
Choose incorrect statement
With regard to ecological food chain, man is a
One of the following atoms often limit the primary productivity of an ecosystem