A food web
Increases variety of food at each trophic level
Delicately balances the inter relations amongst organisms
Decreases variety of food but increases quantity of food at each trophic level
Increases variety as well as quantity of food at each trophic level
Energy flow and energy transformations in living systems strictly conform to the
They are not primary producers in an aquatic ecosystem
Match the trophic levels with their correct species examples in grassland ecosystem.
$(a)$ Fourth trophic level | $(i)$ Crow |
$(b)$ Second trophic level | $(ii)$ Vulture |
$(c)$ First trophic level | $(iii)$ Rabbit |
$(d)$ Third trophic level | $(iv)$ Grass |
Select the correct option :
$(a)\quad(b) \quad(c) \quad(d)$
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 |
Food and energy relationships among living components of ecosystem is generally referred as