What distinguishes Archaea from Bacteria?

Rhizobium bacteria live in the roots of legumes and fix nitrogen in exchange for sugars.  What type of symbiosis is this?

All of the following are risk factors for aneurysm except:

The IVC lies along the posterior surface of what lobe of the liver?

Match the letters to the correct structure

Why would a sonographer choose to use a high frequency transducer when scanning the carotid arteries?

A patient presents to the sonography departments with a history of elevated blood pressure, smoking, and a high cholesterol diet. The sonographic evaluation reveals a large pulsatile structure measuring 8cm that extends from the renal arteries to the iliac arteries. Color Doppler reveals flow throughout the lumen of the vessel but no flow on the exterior of the structure. The patient has had no surgeries. What does this structure most likely represent?

The fetal shunt in the liver used to move blood from the umbilical vein to the IVC is the _____

The anatomic area(s) NOT seen in a transverse plane

A bacterial cell that takes up DNA from its environment is undergoing: