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12.Ecosystem
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They are not primary producers in an aquatic ecosystem
A
Phytoplankton
B
Algae
C
Higher plants
D
None
Solution
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Standard 12
Biology
Similar Questions
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 |
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