You might have to be more specific. All of the following structures except what?
How is controlling wide spread/contagious diseases made difficult by the fact that it spreads through multiple species of animals?
(is it still too complicated?)
calvin cycle, c3 cycle, black pathway!
Plasma membrane allows some material to pass through it while on the same time it blocks other material from entering through it.
Answer:
Ozone
Explanation:
In the stratosphere, ozone is created primarily by ultraviolet radiation. When high-energy ultraviolet rays strike ordinary oxygen molecules (O2), they split the molecule into two single oxygen atoms, known as atomic oxygen.