Epithelial tissue is the type of tissue that lines the body cavities.
Anthropologist use the term Enculturation to refer to the process of learning your culture, ordinarily as a child.
This situation is the perfect example of the random process that is called genetic drift. A minor, usually, form of evolution that works best in small <span>populations or in situation as you have described above.
I hope you get this answer right!
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Semipermeable means only certain substances can pass through. I imagine you are talking about cell membranes which are semipermeable. This means vital things like oxygen and nutrients are able to pass through the membrane, while not allowing everything to enter the cell