Which of the following is Ture for the rest posture of the hand? A: dorsal extension 10°-15° B: dorsal extension 20°-25° C: ventral flexion 10°-15° D: ventral flexion 20°-25° E: none of the above

Which of the following is Ture for the function posture of the hand? A: dorsal extension 10°-15° B: dorsal extension 20°-25° C: ventral flexion 10°-15° D: ventral flexion 20°-25° E: none of the above

In the center of the spinal cord is a butterfly-shaped area of . A: white matter B: dorsal root C: gray matter D: ventral root

哺乳动物的细胞程序性死亡与下列哪一基因有关？（） A: ced-3 B: bcl-2 C: hunchback D: dorsal

The snapper, a large-headed fish with a long dorsal fin, is named to its characteristic way of suddenly shutting its mouth.() A: with B: to C: suddenly D: its

The end of the vas deferens in bovine, sheep and horse is enlarged in the shape of a spindle on the dorsal side of the bladder, forming the ampulla of the vas deferens, and there are funnel glands in the mucosa.

昆虫体节的发育受到以下哪一基因的调节？（） A: HOM基因 B: Hox基因 C: bicoid基因 D: dorsal基因

The parasympathetic preganglionic fibers in glossopharyngeal nerve arise from . A: dorsal nucleus of vagus nerve B: inferior salivatory nucleus C: hypoglossal nucleus D: superior salivatory nucleus

支配前锯肌的神经为： A: thoracodorsal nerve B: long thoracic nerve C: subscapular nerve D: dorsal scapular nerve E: intercostal nerves

在昆虫的背腹轴的分化中，最重要的基因是（） A: dorsal基因； B: gurken基因； C: tube基因； D: spatzle基因；