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.

Did you know that a blue wales tongue weighs more than an elephant?

Differentiate renewable and nonrenewable resources

Astudent poured a solution of bromothymol blue indicator into three test tubes. then he placed an aquatic plant in two of the test tubes, as shown below. he placed a stopper on each test tube and placed them all in the dark for 24 hours. bromothymol blue turns from blue to yellow in the presence of co2