U·ni·cel·lu·laradjective
BIOLOGY(of protozoans, certain algae and spores, etc.) consisting of a single cell.(of an evolutionary or developmental stage) characterized by the formation or presence of a single cell or cells.
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Answer:
I would limit almost anything on the mountains.
Along with that, build very sturdy walls to assist prevention from them hitting the city, of course have the "moved land" to a different location.
Leaves are the only natural item listed.
Pesticides, smog, and disposable products are not natural.
Answer:
Collect DNA from individuals who are lactase persistent and are from the global hot spot populations. Then look for genetic differences correlated with lactase persistence; the first place to look would be in and around the lactase gene. Compare the genetic differences to see if they are the same or different.
Explanation:
Scientists developed the time scale by studying rock layers and fossils world wide.
Radioactive dating helped determine the absolute divisions in the time scale. so mass extinction help because there is more to study
