Which of the following trophic levels are occupied by sparrow?
Primary consumer, primary producer
Secondary consumer, top carnivore
Primary producer, secondary producer
Primary consumer, secondary consumer
First link in any food chain is a green plant because
The second order consumer in a food chain is
The number of trophic levels in a food chain is limited to $4$ or $ 5$ because
Secondary productivity is rate of formation ofnew organic matter by
Match the columns:
Column - $I$ | Column - $II$ |
$(a)$ Saprotrophs | $(i)$ He makes his food |
$(b)$ Omnivores | $(ii)$ Dependent on dead |
$(c)$ Autotrophs | $(iii)$ Eat other animals for food |
$(d)$ Vegetarian | $(iv)$ Fertilizers for plants |