I believe it has something to deal with helping the zebras adapt to their surroundings.
Darwins observations explain that zebras have stripes to adapt to their surroundings.
Answer:
Nitrogen is converted from atmospheric nitrogen into forms, such as NO2-, in a process called fixation. The majority of nitrogen is fixed by bacteria, a lot of which are symbiotic with plants.
Answer: Fixation
<span>General Characteristics of Porifera. These are multicellular organisms which are sessile/sedentary in nature.
Source: Google</span>