When evaluating a pa axial projection of the skull with a 15-degree caudal angle, the radiographer should see
1. petrous pyramids in the lower third of the orbits
2. equal distance from the lateral border of the skull to the lateral rim of the orbit bilaterally
3. symmetrical petrous pyramids
a 1 and 2 only
b 1 and 3 only
c 2 and 3 only
d 1, 2, and 3

D. 1, 2, and 3

Explanation:

Caldwell method explains that the radiographer must be able to see only petrous pyramids in lower third of the orbits, and also visualize similar distance from the lateral border of the skull to the lateral rim of the orbit bilaterally with symmetrical petrous pyramids when evaluating a PA axial projection of the skull with a 15-degree caudal angle.

explanation:

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.

a few examples of ethical concerns involving genetically engineering of humans include

-privacy of genetically tested people

- potential side effects

-long term effects