EVOLUTION
DARWIN’S THEORY OF NATURAL SELECTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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natural variability for a trait in a population
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Trait must be heritable (inherited)
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Trait must affect all of organisms in the species
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Trait must give the organism an advantage allowing it to reproduce
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Detailed explanation-1: -Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population.
Detailed explanation-2: -Evolution by natural selection is the inevitable consequence of three simple conditions: variation, inheritance, and differential reproductive success.
Detailed explanation-3: -Natural selection requires heritable variation in a given trait, and differential survival and reproduction associated with possession of that trait. Examples of natural selection are well-documented, both by observation and through the fossil record.
Detailed explanation-4: -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)