Endocrine signaling is hormone based signaling that travels through the blood stream. Many of the sensors and integrating sensors of the endocrine system are located in the brain. The brain barrier contributes to endocrine signalling, such that the brain barrier does not factor in with endocrine signalling. The answer is A
Explanation:
A common way to clear icy roads is to apply a layer of salt, which lowers the freezing temperature of water and melts the ice.
The answer would most likely be D. Mass Extinction
Phylogenetic
Scientist use a phylogenetic tree to track the evolutionary history of a species.
One of the 4 layers that surrounds the earth.
