The cell membrane protects the cell from unwanted things coming inside. It is a barrier. Composed of a phospholipid bilayer with embedded proteins, the plasma membrane is selectively permeable to ions and organic molecules and regulates the movement of substances in and out of cells.
A. for cooking food and transmitters
During cellular respiration, oxygen is a necessary ingredient to make its process possible. Losing the forests would create a very huge impact on the cellular respiration in other organisms since the forest, which is composed of plants and trees, is the main source of oxygen. Without oxygen, cellular respiration will not happen in other organisms which would result in scarce food and eventually, most of the organisms will die.
Population growth is the increase in the population number of a given species in a time. Longevity, migration and fertility rates affect population growth.
<h3>What are the factors affecting population growth?</h3>
<u>Increased Longevity</u> has impacted the population growth as the life expectancy has resulted in the accumulation of more people as their age of living has increased.
<u>International Migration</u> can affect the population growth positively and negatively as moving of the person from one region will decrease its population growth while the region where they go will have increased population.
<u>Fertility Rates</u> has a great impact on the population as the fertility rate had decreased due to many factors and the population has declined.
Therefore, option A. longevity option B. migration and option C. fertility rates influence the population growth.
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The system is open.
An open system is one where mass is able to flow in and out of the system. The mass entering this system is the water that is added to the fish tank, and the leaving mass is the waste that is generated.
The primary advantage of using this system is that the quality of the water supplied to the fish may be maintained, meaning the fish are healthy and do not have to live in waste, as they would have to if the system was closed.