Red blood cells carry oxygen around the body. These specialized cells are outfitted with the substance hemoglobin, which is a protein, and is the actual oxygen carrying molecule on the cell. The cell has a unique shape that allows it to carry as much oxygen molecules as possible. Red blood cells also transport carbon dioxide away from cells and back to the lungs where the cells are then re-oxygenated.
Answer:
Carrying capacity- maximum population size of a species that can be sustained in a specific environment
Emigration- departure from one's own natural home or region
Limiting factor-anything that can slow or stop the growth of a population
Population dynamics- how populations of species change over time
In commensalism, one organism benefits from the relationship while the other species involved neither benefits nor is harmed. The benefits for one organism can be in a variety of forms, including food, shelter, transportation and seed dispersal.
