Lamarck was one of the first scientists to propose that species evolve by natural selection.

Lamarck was one of the first scientists to propose that species evolve by natural selection. Lyell was one of the first to say that Earth must be far older than most people believed. Lamarck's inheritance of acquired characteristics is has become a widely accepted scientific theory.

Smoking, drinking alcohol ,poor nutrition and HIV lowers our immune system .

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