Amaterial that cannot be broken down into anything simpler by chemical reactions

Which direction does the energy flow in this energy pyramid ?

Select the correct answer. what is the observable characteristic of a person called? o a. genotypephenotypeoc. alleleo d. gene

The human body needs energy in order to carry out life processes such as breathing. where does the body get this energy? a. from eating food b. from learning about new things c. from lying in the sun d. from sleeping