Answer:
No I don't think sand or silt is alive because it's not breathing its not an organism.
Answer:
2. dopamine
Explanation:
Dopamine is one of the neurochemicals involved in the transmission of signals between the neurons of the brain. It is usually referred to as “the feel good” “happy” hormone that is released when stimulated by engaging in a pleasurable experience or activity. Dopamine controls the emotional and mental processes of humans. It is important in sexuality of human as it is responsible for the pleasurable feelings of satisfaction we experience.
At this point in time, we have yet to reach the carrying capacity for humans. So yes there is a carrying capacity for humans we just haven't reach it yet.
1. All living organisms are composed of one or more cells.
2. The cell is the basic unit of structure and organization in organisms.
3. Cells arise from pre-existing cells.
4. All cells maintain homeostatis.
Sphenoid bone spans the width of the cranial floor; keystone of the cranium <span>because its central wedge articulates with every other cranial bone </span>