Answer:
The answer is Weber's law
Explanation:
In the context of the difference threshold, Weber's law is the principle that two stimuli must differ by a constant proportion to be perceived as different.
- Weber's Law states that "for the difference to be perceptible, two stimuli must differ by a constant proportion, not a constant amount".
<em>Active transport</em><em> uses </em><em>cellular energy</em><em> to </em><em>move molecules</em><em> based on the </em><em>concentration level</em><em> and </em><em>Passive transport doesn't</em><em> require </em><em>energy</em><em> to </em><em>move molecules within</em><em> their </em><em>cells</em><em>.</em>
<u>EXPLANATION: </u>
Active transport uses cellular energy for this movement. It uses energy stored in ATP to begin the transport. This means that the molecules transfer from an area where it is less in number to an area with a high concentration of molecules.
But Passive transport specifies the movement of molecules across cell membranes which doesn't require energy as it depends on the cell membrane's penetrability. Molecules just have to circulate in or out of the cell.
C Eletric cells send message and it has to receive those signals
Answer: [A]
Explanation:
without a source of current, there is no functioning.
The Grand Canyon contains Sandstone, Shale (mudstone), and Limestone.
