The percentage of light energy utilized for photosynthesis by higher plants is
$100\%$
$50\%$
$10\%$
$1$ to $2\%$
Which of the following has the greatest amount of energy
Major conduit of energy in land and aquatic ecosystem is transferred through ______ and ______ respectively.
Food chain consists of
Which is the correct sequence in the food chain in a grassland
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 |