Answer:
I so I am also a bit confused, but I hope this could answer your question!
Explanation:
The bacteria possess a cell wall composed of peptidoglycan molecule formed by the amino acids called murine. The bacterial cell wall helps in the survival of the bacteria in some extreme condition like when placed in a hypotonic solution.
The hypotonic solution is formed when it has low solute concentration and high water amount when compared. When the bacterial cell will be placed in hypotonic solution then the water will move inside the cell down the concentration gradient as a result of which the bacterial cell will swell but will not burst.
This happens as the cell wall contains expansin protein which allows the cell wall to expand and provides rigidity to the cell.
Acid precipitation is rain, snow, or fog with a pH lower than 5.2 making it more acidic. This is important to living organisms because compounds created by the burning of fossil fuels react with water in the air to formacids that fall to Earth.
It can be a predetor to some animal, yet be a prey of another
example
piranah eat shrimp (or other small fish)
people eat piranah
The first one is that transport proteins in the cell membrane ' Pick up ' molecules from outsides the cell and carry them in , while using energy in the process
The second method is that the the cell membrane surrounds a particle and takes it in
I hope that's help !
I believe it's A. If an organism changes and evolves slowly over time it is caused by variation, which helps the species adapt to it's habitat and way of life
