2. Which of the following is a gill breather?
A. amoeba
B. tadpole
C. frog
D. earthworm

3. Unicellular organisms breathe through:
A. gills
B. body surface
C. lungs
D. none of these



Answer :

Final answer:

Amphibians use gills for breathing in early life and skin as a respiratory organ, with a dense network of capillaries facilitating gas exchange.


Explanation:

Amphibians utilize gills for breathing early in life, and develop primitive lungs in their adult life; additionally, they are able to breathe through their skin. Earthworms and amphibians use their skin as a respiratory organ, with a dense network of capillaries facilitating gas exchange.

  • Gills
  • Diffusion
  • Amphibians

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