The 5th Wave_By Rich Tennant
"Is this so diiiicult? "bend at the viaist and lî£t -with your legs."
n organism's genetic make up has a huge impact on more than just its physical characteristics, like how many limbs it has or how fast it can run. It can also affect sex selection (how an organism picks a mate), social behaviors (how — and how well — an organism gets along with others), and life histories (life spans and age of reproductive viability). See the connection? If genes impact everything, and evolution impacts genes, then there's an evolutionary component in not only how we look, but also how we behave and interact. This part explains it all.
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