The reason for the increase is that the light-colored moths are no longer "selected against" by predators. These birds could only see the light ones against a sooted background. After removing the dark soot, these predators could no longer distinguish the light ones from their natural light background. Thus more light-colored moths survived to reproduce, passing on more of their recessive genes for light color to their offspring. After several hundreds of generations, most of the later generations were light, due to selective advantage of camouflage to survive predation.
Answer:
SA node
Explanation:
The SA node (called the pacemaker of the heart) sends out an electrical impulse. The upper heart chambers (atria) contract. The AV node sends an impulse into the ventricles. The lower heart chambers (ventricles) contract or pump.
Lichens represented by this symbiotic relationship for primary succession
i just think
Hi!
Your answer is Carbonic acid wearing away the minerals in a rock.
Hope this helps!
~CoCo
