The movement of substances across a cell membrane from an area of lower concentration to an area of higher concentration, which requires cellular energy & a carrier protein is called:

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

Which statement correctly explains what is happening?

When theorizing about human physiology, descartes relied heavily on the hydraulic model he observed in moving statues. in descartes' view of humans, flowing in nerves is (are) analogous to water flowing in the pipes of the statues?