How do animals get energy from food?

a. molecules from the food react with carbon dioxide and release energy.

b. sound vibrations in the body are used to change food into energy.

c. electrical impulses in the body are used to change food into energy.
d. molecules from the food react with oxygen and release energy.

1. variations in a population of moths allow for some of its members to be able to adapt to environmental changes. the better adapted of the moths will be able to survive the change and thus prevail as the “fittest” of the species. (a) describe three mechanisms in which variation can occur within a species population. (b) explain which mechanism or mechanisms would be responsible for the survival of a population of peppered moths better than white moths in an environment affected by industrial soot. justify your answer.

Which entry is in the wrong position in the table?

How can a geological time scale best be reconstructed? a) comparing vestigial structures in living species b) comparing homologous structures in living species c) examining homologous structures in fossil remains d) examining the written records of scientists from past cultures