Energy Flow Through Ecosystems

In a forest ecosystem, transfer of energy in a food chain:
A. Lion
B. Deer
C. Vulture
D. Plants
E. Fungi & bacteria
Choose the correct answer from the options given below:

Pyramid of energy in an ecosystem is always -

An ecosystem has
A. Plants are the first trophic level
B. Primary consumers are always carnivore
C. Primary and secondary consumers are herbivore
D. Secondary consumers are carnivore
E. Tertiary Consumers are the fourth trophic level
Choose the most appropriate answer from the options given below: