Question

1. Which of these organisms get rid of all kinds of body wastes by direct diffusion
through their cells?
a. Amoeba and paramecium
b. Insects and earthworms
c. Amphibians and leeches
d. All of these​

Answer 1

Answer:

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

Answer:

ammonia and paremaecium