Which of the following organisms forms the first trophic level of a food chain?

  • A
    Deer
  • B
    Grass
  • C
    Lion
  • D
    Decomposers

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List two man-made ecosystems.

Excessive exposure of humans to $UV$-rays results in:
$(i)$ Damage to immune system
$(ii)$ Damage to lungs
$(iii)$ Skin cancer
$(iv)$ Peptic ulcers

Three of the following components belong to one group,while one component is different from the group. Which component is the odd one out?

Edaphic factors are included in $......$

Which of the following organisms is a producer?

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