48. Why does blood turn dark red as it circulates through the body?
(a) It starts to clot.
(b) It gets old and dirty flowing through the
body.
(c) The oxygen in it is replaced with carbon
dioxide.
(d) The farther blood is from the heart, the
more dark red it is.

it is a

explanation:

currents is the correct answer.

the "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

i hope this

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