Which prefix indicates germ or bud?

• A. Isch/o
• B. Xer/o
• C. Blast/o
• D. Arc/o

Answer: (C)

Germ or bud is signaled by the prefix blast/o, from the Greek blastēs meaning a germ or bud. This form appears in embryology terms like blastomere (a cell formed during early division), blastocyst (an early-stage embryo), and blastoderm (a layer of cells in the developing embryo). Because the question focuses on indicating a germ or bud, blast/o fits best. The other prefixes describe different ideas—isch/o relates to blockage or deficiency, xer/o means dry, and arc/o refers to something curved or bowed—so they do not convey the germ or bud sense.