I think it’s phenotype bc phenotypes is what the natural selection acts on bc it’s what interacts with an organisms environment and not the genotype.
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can you do another post zooming it in
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Respiratory issues could link in with the climatic issue of air pollution
Explanation:
Your answer is leukocytes.
Filtered blood leaves the kidney through the renal vein and flows back to the heart. Pee leaves the kidneys and travels through the ureters to the bladder. The bladder expands as it fills.
