Where in the embryo does mesoderm first appear?
A) between the cell layers of the inner cell mass
B) within the blastocoele
C) in the chorionic villi
D) above the epiblast
E) around the trophoblast
A
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What level of protein synthesis is represented by the coiling of the protein chain backbone into an alpha helix?
A) primary structure B) secondary structure C) tertiary structure D) quaternary structure
In livestock, the nipple of the mammary gland is called the:
A) teat B) sole C) udder D) mammary
When a cell is placed into a(n) ________ solution, the cell maintains its size.
A. hypertonic B. isotonic C. hypotonic
Arteriosclerosis is characterized by
A. a thickening of the tunica adventitia. B. increased elasticity of the tunica media. C. decreased resistance to blood flow. D. an enlargement of the lumen of the vessel. E. thickening of the tunica intima and loss of elasticity in the tunica media.