Question

List the trends in human evolution. In your opinion what are the selection pressure determining the future of man? should be a 200 words answer
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Answer 1

Answer:

Three other trends are important in theevolution of hominins: bipedalism, non-honing chewing complex, and encephalization of the brain. These are discussed in more detail next.

Selection pressures are external agents which affect an organism’s ability to survive in a given environment

Selection pressures can be negative (decreases the occurrence of a trait) or positive (increases the proportion of a trait)

Selection pressures may not remain constant, leading to changes in what constitutes a beneficial adaptation

Types of selection pressures include:

Resource availability – Presence of sufficient food, habitat (shelter / territory) and mates

Environmental conditions – Temperature, weather conditions or geographical access

Biological factors – Predators and pathogens (diseases)

Selection pressures can be density-dependent (affected by population size) or density-independent (unaffected by population)