The hydrosphere i believe, hope this helps!
In biology, a mutation is the permanent alteration of the nucleotide sequence of the genome of an organism, virus, or extrachromosomal DNA or other genetic elements. Mutations result from errors during DNA replication or other types of damage to DNA, which then may undergo error-prone repair, or cause an error during other forms of repair, or else may cause an error during replication. Mutations may also result from insertion or deletion of segments of DNA due to mobile genetic elements. Mutations may or may not produce discernible changes in the observable characteristics of an organism.
In order to test hypotheses about natural selection favoring stripes in zebras or otherwise, researchers will have to assume that stripe colors are heritable in zebra.
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Natural selection</h3>
Natural selection forces only act on heritable traits/genes so as to help organisms adapt to changes.
Traits that are developed as a result of the environment without any underlining genes are not heritable and cannot be selected or deselected by natural selection forces.
More on natural selection can be found here; brainly.com/question/1657375?referrer=searchResults
Carbohydrates- cellulose cell wall in plants, chitin exoskeleton & fungal cell wall
Lipids- cell membrane (phospholipids)
Protein- Fibrous ( skin, fingernails, horns, feathers)
Necleic acid- stores genetic info(dna)