Answer:
a,b and c
Explanation:
( it might be wrong pls dont report me just let me kno y its wrong )
Answer:
Flatworms and cnidarians
Explanation:
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:
I'm pretty sure it's the white blood cells, because they contain antibodies to neutralise the pathogen :)
B. Halons............................
Answer:
arboriculturists or arborists
Explanation:
are also know as tree surgeons
