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Blood travels through many different channels to optimize absorption. The water potential in the solution in the dialysis machine will need to be less than in the blood. If all the blood flows through a single large channel the blood water potential may be more negative than outside, therefore slowing absorption.
I don't know the answer options, but it would probably either be phase of matter or physical change.
More organisms are born than can survive.
I think that would be answer choice b because it states in the question "existed earlier in time" and evolution is basically things that existed at an earlier time adapting to environmental changes to evolve into something different for their benefit
These cells consume bacteria and other pathogens to protect the body from infection. The process begins when chemicals from a pathogen, or damaged tissue, attract a phagocyte. The phagocyte binds to the microbe, envelopes it, and then eats it.