8. Testosterone is an example of a chemical signal that affects, variously, the very cells that synthesize it in the testis, the neighboring cells, and distant cells outside the gonads. Thus, testosterone is an example of __. (A) a neurohormone signal, a neuroendocrine signal, and an exocrine product (B) a paracrine signal, a synaptic signal, and an exocrine product (C) an autocrine signal, a neuroendocrine signal, and a synaptic signal (D) an autocrine signal, a paracrine signal, and an endocrine signal

14. Researchers were investigating the effects of bicoid in fruit fly development. The gene bicoid controls normal development of anterior structures in flies. In one experiment, they took a normally developing embryo and injected bicoid mRNA into the posterior end of the embryo. What result would they most likely observe? (A) The embryo would develop with a normal anterior end and anterior structures on the posterior end. (B) The embryo would develop with a normal posterior end and posterior structures on the anterior end. (C) The embryo would develop with anterior structures on the posterior end and posterior structures on the anterior end. (D) The embryo would develop with a normal anterior end and a normal posterior end.

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