Im not so sure about this answer
Answer:
how do animals obtain oxygen? animal cells exchange oxygen and carbon dioxide with their surroundings by diffusion across the puter coverings or membranes of cells.
Explanation:
It is alanine. Glad to help ;)
Each culture grew to ≈1–2 × 1010 cells, which were pelleted by centrifugation, spread on an MC plate, and incubated for 45 days.