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12.Ecosystem
medium
Give differences : Grazing food chain and Detritus chain
Option A
Option B
Option C
Option D
Solution
| Grazing food chain | Detritus chain |
| $(1)$ It begins always with green plants to fertiary consumers. | $(1)$ It starts from decomposers. |
| $(2)$ Green plants are first organisms which absorb solar energy. | $(2)$ Bacteria and fungi are found at its firs trophic level. |
| $(3)$ Rate of energy flow is less. | $(3)$ Rate of energy flow is more. |
| $(4)$ Large organisms regulate this chain. | $(4)$ Small organisms regulate this chain. |
Standard 12
Biology
Similar Questions
Match the List$-I$ with List$-II$ :
| List$-I$ | List$-II$ |
| $a$ Carbon dissolved in oceans | $i$ $55$ billion tons |
| $b$ Annual fixation of carbon through photosynthesis | $ii$ $71 \%$ |
| $c$ $PAR$ captured by plants | $iii$ $4 \times 10^3\,kg$ |
| $d$ Productivity of oceans | $iv$ $2$ to $10 \%$ |
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 :
$(a)\quad(b) \quad(c) \quad(d)$
