How many food chains are there in the food web shown above?
$2$
$3$
$5$
$7$
The average trophic efficiency of transfer of energy from one trophic level to the higher trophic level is called
Match the following columns.
Column $- I$ | Column $- II$ |
$(a)$ Phytoplankton, grass | $(p)$ First trophic level |
$(b)$ Man, Lion | $(q)$ Herbivore |
$(c)$ Zooplankton, Cow, Grasshopper | $(r)$ Third trophic level |
$(d)$ Birds, Wolf | $(s)$ Top carnivore |
In pond ecosystem, diatoms represent
Vegetable eating person acts as
In a terrestial ecosystem such as forest, maximum energy is in which trophic level