Which part of the respiratory system are two tubes that branch from the trachea to each of the lungs?

a.
diaphragm

b.
alveoli

c.
bronchi

d.
trachea

Which action best increases one’s stamina a) exercising when you feel like it b) saving so much that one like sleep c) refusing to exercise to save the energy needed to work d)exercising on a regular basis

Which shows a correct order of steps in the scientific method? develop a hypothesis, analyze data, draw conclusions, make observations develop a hypothesis, analyze data, make observations, draw conclusions make observations, develop a hypothesis, analyze data, draw conclusions make observations, draw conclusions, develop a hypothesis, analyze data.

Which two levels of the spine that can undergo flexion and extension?