The material or substance on which an enzyme acts upon is known as the substrate, they are nothing but reacting molecules and or substances that are able to ultimately be converted to product substances. By the aid of biological enzymes, that lower the energy of activation needed for a chemical reaction to proceed.
Another geologic event that may occur in the dark shaded area on the map is wildfire. The dark shaded area as shown in the map, is an area more commonly known as "The Ring of Fire". Volcanic activity is very common in this area, due to to the many volcanos present.
I am pretty sure that the tissues which receive stimuli and conduct impulses or electrical signals in the body are being shown in the option : Nerve tissues. I choose this one because, according to the definition of nerve tissue, this is <span>the main tissue component which perform all the listed processes.
Hope that helps!</span>
Answer:
the limestone is the youngest, and therefore the top most rock layer found at the Grand canyon
