Which of the following is producer of plant kingdom
Melia
Ficus
Ziziphus
All the above
It’s obvious.
Distinguish between
$(a)$ Litter and detritus
$(b)$ Primary and secondary productivity
An ecosystem must have continuous external source of
Standing state of the ecosystem is
Which group of living organisms given below is a link in food chain between green plants and hawk
Generally the food chain has how many trophic levels
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