Answer:
b. diffusion.
Explanation:
Diffusion can be defined as the movement of gas molecules from a region of high concentration to a region of lower concentration until an equilibrium is attained or reached. This mixing of gas molecules in the liquid or gaseous state is due to their kinetic energy of random motion i.e without requiring bulk motion.
This ultimately implies that, diffusion is a phenomenon through which gas molecules in either a gaseous or liquid state spread out in response to a concentration gradient, which is simply the difference in concentration of the gases across a space.
During diffusion, molecules move from areas of high concentration to areas of low concentration.
In this context, the process by which dissolved gases are exchanged between the blood and interstitial fluids is referred to as diffusion.
On a related note, this process is also referred to as internal respiration because it involves the exchange of oxygen gas and carbon (II) oxide gas between tissue cell and capillaries.
There’s no picture, I need a picture to help you
Calcium is the #1 material needed for bone development
Answer:
Three reasons: Indians, trains and buffalo hides.
Explanation:
The buffalo came close to extinction in the late eighteen hundreds when their number fell down to only a few hundred. The settling Americans needed to get rid of the Indians and of their primary food source, the buffalo. So they eradicated most of them. Another reason was that the buffalo posed a dangerous threat to the new trains that had tracks running across the country. Without the buffalo roaming around the trains would be more efficient and in less danger. The buffalo hides were used for making robes and rugs. Unlike the buffalo, cattle is being mated and cared for.