Question

Speculate on what seem to be the major selective pressures acting upon the worldwide population of human beings at this time. Would the selective pressures be different from human populations that had no technology beyond the ability to make fire?

Answer 1

SELECTIVE PRESSURE IS A PHENOMENA WHICH ALTERS THE BEHAVIOUR AND FITNESS OF LIVING ORGANISM WITHIN A GIVEN ENVIOURNMENT .IT IS THE DRIVING FORCE OF EVOLUTION AND NATURAL SELECTION CHANGES IN CLIMATE ABIOTIC SELECTIVE PRESSURE AND INFECTIOUS DISEASES ,BIOTIC SELECTIVE PRESSURE ARE THE SELECTIVE PRESSURE NOW A DAY HUMANS HAS TO FACE

GLOBAL WARMING LEADS TO STRONG SUNLIGHT IS SELECTIVE PRESSURE THAT FAVOURS DARK SKINNED PEOPLE .

IN CASE OF DISEASES A HIGHLY EFFICIENT IMMUNESYSTEM AGAINST VIRAL INFECTIONS HELPS TO SURVIVE .UNFORTUNATELY PATHOGENS HAVE A PHENOTYPE THT INCREASES THEIR RESISTANCE TOWARDS HOST IMMUNITY

IN PAST FOOD AND ENERGY RESOURCES IS THE SELECTIVE PRESSURE ABILITY TO HUNT IS THE ADVANTAGE FOR SOME HUMAN BEINGS TO SURVIVE . BUT NOW WITH BENEFITS OF GREEN REVOLUTION AND OTHER AGRICULTURAL REVOLUTION WE ARE ABLE TO MEET THE SCARCITY OF FOOD . THUS THE SURVIVAL PRESSURE IS DIFFERENT IN DIFFERENT PERIODS

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