Which part of the respiratory system branches off of the trachea? a]diaphragm
b]nasal cavity
c]bronchus (bronchi, pl.)
d] arynx

Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?

Which of the following can be reduced by the use of renewable energy sources? a. social costs b. economic costs c. environmental costs d. all of the above select the best answer from the choices provided a b c d

Describe how a student should adjust the microscope to see the cells on a slide more clearly?