sentences: barney is a human & a human is a kind of organism ->  barney is a kind of organism  barney is a kind of organism & an organism 's environment affects that organism 's acquired characteristics ->  barney's acquired characteristics are affected by his environment  barney has a scar on his ear & a scar is an acquired characteristic ->  barney's scar on his ear is an acquired characteristic  barney's acquired characteristics are affected by his environment & barney's scar on his ear is an acquired characteristic -> barney's scar on his ear is affected by his environment