Homologous structures might be the result of a change in allele frequencies over successive generations. why have these structures probably continued? they were predestined in a species. they were beneficial in a particular environment. they were neutral, not harmful, mutations. they made a particular organism more attractive to a mate.

1. the energy lost to disorder metabolism     -entropy

2. related to or possessing motion potential     -kinetic

3. all of the chemical reactions in an organism required for maintenance of the processes of life entropy     -metabolism

4. possible; ability to go into action or perform work kinetic     -potential

5. the study of energy and its transformations thermodynamics     -thermodynamics