Leaves change color during fall to adapt to the weather changes in the environment. This happens when plants are conserving energy in preparation for the harsher weather. They stop making chlorophyll within their plant cells and as a result plants lose their leaves.
When Amanda poured some of the liquid in a test tube, she noticed that the edges of the water curved upward, which is an example of adhesion.
When Pol filled another test tube to the top, the liquid formed a low dome, which is evidence of cohesion.
When Amanda added table salt to the first test tube and shook it, she noted that the liquid had dissolved the solute.
All of these observations indicated the presence of covalent bonds.
Pol determined that the pH of the sample is 7, which shows the sample is neutral.
Based on all of the evidence Amanda and Pol gathered, the unknown liquid is water.
<h2>A) option is correct </h2>
Explanation:
The permissive effect is the one in which the presence of one hormone enables another hormone to act
Epinephrine is an endocrine hormone produced by adrenal glands in stress condition and prepare body for fight and flight
Thyroid hormones exert their effects by binding to a specific nuclear receptors to regulate cellular gene expression
Receptor associated with epinephrine signaling are 1,2,β1 and β2
β1 associated trimeric G protein is GS which activate adenylate cyclase enzyme which catalyse production of a potent secondary messenger called cAMP