Neo Darwinism explains the raw material of evolution as arising from
- A. mutation and genetic recombination
- B. use and disuse of organs
- C. the needs felt by the organism
- D. the direct action of the environment on the gametes
Explanation
The modern synthesis keeps Darwin's natural selection and adds genetics: mutation creates new alleles and sexual reproduction shuffles them by recombination, producing the variation selection acts on. Selection then changes allele frequencies in the population, which is what evolution now formally means. Use and disuse and organism felt need are Lamarckian ideas that the synthesis explicitly excludes.
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