Please help • What happens to the rib cage during inhala-
tion and exhalation

•What happens to the diaphragm during in-
halation and exhalation

•How these movements affect the volume of
the chest cavity

•How these movements affect the air pressure
in the lungs

Which flexible structure that supports the nerve cord and led to the backbone

Which of the following represents the chemical reaction of hydrazine and hydrogen peroxide to produce nitrogen and water? a. nitrogen + hydrogen peroxide → hydrazine + water b. nitrogen + water → hydrazine + hydrogen peroxide c. hydrazine + hydrogen peroxide → nitrogen + water d. water + hydrogen peroxide → nitrogen + hydrazine

Study the diagram of a desert food chain . what would most likely happen if the kangaroo rats were killed off and removed from the food chain ?