Which of the following could alter the expression of genes in an organism

Nucleic acid certain protein cell membranes certain carbohydrates

Imagine you are introducing the lac operan and the trp operon to students who have never learned about it before. complete the table to compare the similarities and differences between the two operons

Body temperature is tightly regulated in mammals for example when external temperatures drop too much the body of a mammal responds by in order to its core temperature?