Compare the informal and formal methods for making constitutional changes to a state’s constitution and discuss the advantages and disadvantages of each.

53.69 °F is also _______ K. (Hint: oC = (5/9)(oF – 32) and K = oC + 273)

Silicon has _______ valence electrons.

Figure 18.4Using Figure 18.4, match the following:Right atrium.

The capillaries have thin walls and arteries have thick walls.

The Tunica adventitia layer of the blood vessels consist of hyaline cartilage.

The cross section of blood vessels (artery and vein) shows three layers. they are ______, ________, and ______.

The cartilage rings prevent trachea from collapsing.

The label 23 is Abdominal Aorta.  

The ______ carry oxygenated blood from the lungs to the heart.