What were Lamarck’s main proposed mechanisms of evolution? i. Organisms evolve …

What were Lamarck’s main proposed mechanisms of evolution?

i. Organisms evolve to become better suited to their environment
ii. Evolution is descent from a common ancestor, with modifications to
allele frequencies
iii. Organismal body parts grow according to how much they are used
iv. Changes that one organism develops in a lifetime are passed onto
offspring
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