Blood is made up of red and white blood cells, platelets and plasma. The plasma consists of water (mostly) and dissolved nutrients. When blood is exposed to air, the blood will clot, due to aggravation of the platelets. Then you get a forming scab that will help heal the part that the blood is being exposed from.
I am tempted to say that the nervous system processes the stimuli, or to be more specific, the neurons that go across our nervous system.
Answer: C. Certain bacteria live within rocks kilometers below the Earth’s surface.
Explanation:
Bacteria are microscopic, usually single-celled living organisms that can be found in many environments. The live in practically anywhere on the planet because they are able to adapt to environmental changes. Bacteria regulate changes or modifications to their cell envelope in a coordinated way, allowing them to survive in different environments.
The main difference between bacteria and other cells is that bacteria are cells that do not contain a nucleus or other membrane-bound organelles.
These organisms can live in soil, the ocean and also inside the human gut. They can be dangerous, for example, when they cause infections they are able to injure different cells and tissues and compromise the immune system. On the other hand, most of the time they are beneficial, as in the process of fermentation such as in wine or yougurt, or helping with the digestion.
A plant cell contains a large, singular vacuole that is used for storage and maintaining the shape of the cell. Animal cells have many, smaller vacuoles. Plant cells have a cell wall, as well as a cell membrane. Animal cells have a cell membrane, but NO CELL WALL.
