Answer:
D, E, and F
Explanation:
The requirements for counter current exchange are gills, bulk flow of blood and water and air and the blood pigment. Also, the fluids should flow in close proximity and flow in the opposite directions.
You can use a plotting compass or iron filings to detect a magnetic field:
1.put a piece of paper over a magnet (this stops the iron filings sticking to the magnet)
2. sprinkle iron filings onto the paper
3.gently tap the paper to spread the filings out
4.observe and record the results
In order for thermal energy to increase, the temperature must also increase.
Passive transport, for example diffusion, does not require added energy because particles flow from an area of high concentration to an area of low concentration.
