Question

1. Animals in which exchange of gases takes place
directly from the water or air through diffusion .
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Answer 1

Answer:

Direct Diffusion

In simple organisms, such as cnidarians and flatworms, every cell in the body is close to the external environment. Their cells are kept moist so that gases diffuse quickly via direct diffusion. Flatworms are small, literally flat worms, which 'breathe' through diffusion across the outer membrane.

Answer 2

Explanation:

sponge and jellyfish lakh spacy lively organs for gas exchange and taking gases directly from the surrounding water flatworms and and use their outer surface as gas exchange surface at poles and lips and fish use gills