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Enzymes are biological catalysts that speed up a reaction
The study in a Pennsylvania forest reveal about the environmental effects of using DDT reveals that a large number of ladybird were killed due to DDT which caused rise in the population of aphids.
DDT is a chemical that was used for killing the insects and keeping the crops safe and productive. It was later found that it has a worse effect on the lives of other non target organisms like other insects, bird and human as well.
It is also known to be associated with the phenomenon of biomagnification. It is a process of accumulation of harmful chemicals with increase in the trophic level which occurs due to continuous intake of food contaminated with chemicals that is not tolerable and causes serious implication.
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Answer:
The Sahel has been labeled as one of those regions with the danger of overpopulation. It has been described with adjectives such as semi-arid, hot, dry, windy or sunny.
Sources have it that the G5 Sahel countries which include Mali, Niger, Burkina Faso, Mauritania, Chad will increase from about 84 million inhabitants in 2019 to 197 million in 2050. This projection includes people under 15 years of age which comprise about 50% of the entire population.
The climate itself doesn't seem to deter population growth. What seems to be occurring is sedentarization. This is due to rapid desertification and drought which have persisted for some time.
Explanation:
Sedentarization refers to the choice of a group of people who usually are very nomadic or migratory to settle permanently in a place.
This is usually due to a more favorable weather and topography which supports agriculture.
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Answer:
The geologic time scale is the calendar for events in Earth history. It subdivides all time into named units of abstract time called escending order of duration eons, eras, periods, epochs, and ages.