In simple diffusion, small molecules without charges such as oxygen and carbon dioxide flow through a plasma membrane without assistance and without expending energy. Other substances such as proteins<span>, glucose and charged particles called ions cannot pass through the selectively permeable membrane.</span>
Answer:
Explanation:
Mint produced more than 130 billion pennies. Then, in 1982 the Mint introduced a penny that is 97.6 percent zinc and only 2.4 percent copper with a density of 7.2 g/mL. By comparison, the old pre-1982 copper pennies were 95 percent copper and 5 percent zinc with a density of 8.8 g/mL.
An indicator species is an organism whose presence, absence, and abundance reveals a specific environmental condition, whether it be a positive or negative condition.
The organelle is the chloroplast. While plant cells will also have a cell wall, the cell wall is not considered an organelle.
<span>Presumably, any salt-to-water ratio would be low, if the water molecules are not removed from the solution, whatever it may be, as salt is typically a very small potion in saline water.</span>