Approximately $9/10$ $(85-90\%)$ of the total photosynthesis on Earth is carried out by:

  • A
    Large trees with millions of branches and leaves
  • B
    Marine algae
  • C
    Fern forests containing chlorophyll
  • D
    Scientists in laboratories

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Select the correct option from the following.

Which of the following carries out anoxygenic photosynthesis?

Under conditions of constant illumination,the compensation period for a whole aquarium would be of infinite length when:

Identify the location and function of the following structures in a chloroplast:
$(1)$ Thylakoid
$(2)$ Stroma

Diffusion, a process that occurs along the concentration gradient, is actively involved in:

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