Answer:
A-Shelter, the others are for enjoyment while shelter takes care of your physical state
Dichotomous Key with smiles
1. Teeth visible ....................go to 2
.....Teeth not visible .................go to 4
2. Has a wide, toothy smile .......Smilus toothyus
....Is not smiling ......................go to 3
3. Visibly crying .................Smilus dramaticus
.... Frowning .......................Smilus upsettus
4. Eyes are symmetrical .... go to 5
....Eyes not symmetrical .....go to 8
5. Eyes shaped like hearts ..... Smilus valentinus
....Eyes are shaped as ovals .....go to 6
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</span>6. Smiling, happy face ...... Smilus traditionalis
.....Not happy, frowning or other .....go to 7
7. Mouth curved down, frowning .... Smilus saddus
.... Mouth is a small circle .................Smilus suprisus
8. Has a pirate eye patch ...............Smilus piratus
....Does not have eye patch ............ go to 9
9. One eye is much larger than the other eye ..... Smilus mutatus
One eye is winking .................Smilus winkus
Answer:
Mutation
Explanation:
In genetics, any heritable change of the base-pair sequence of genetic material is referred to as MUTATION.
SIV (Simian Immunodeficiency Virus) must have undergone mutation, which is the basis of genetic variation or evolution
