Answer:
The membrane is made from polar phospholipids allowing water to move freely in and out of the cell
Explanation:
The cell membrane is the organelle of the cell that allows for substances to be transported into and out of the cell. It is able to do this due to its semi-permeability. The membrane contains a phospholipid component, which contains a polar region that allows for polar substances such as WATER to enter and leave the cell.
The polarity of the phospholipid component of the cell membrane explains why water is insoluble in the middle of the semipermeable membrane.
Nucleotides makes up each individual strand of DNA
Answer:
stromatolites
Explanation:
"stromatolites is a calcareous mound built up of layers of lime-secreting cyanobacteria and trapped sediment, found in Precambrian rocks as the earliest known fossils, and still being formed in lagoons in Australasia"
Ancient cyanobacteria present in stromatolites are considered as key factor for the increased amount of oxygen in atmosphere. Furthermore, these were considered as first organisms to trap carbon dioxide and release oxygen by the process of photosynthesis.
Answer:
Treatment of industrial effluents through the extraction of pollutants before discharge to the rivers
Explanation:
Water contamination is the addition of undesirable materials into rivers, lakes and other bodies of water. Polluted water is unclean and unsafe to use therefore policies are designed to reduce water contamination that possesses risk to human health.
