[Campbell Biology P.434] According to Figure 18.19a and the text, which statement correctly ... | Practice Question
According to Figure 18.19a and the text, which statement correctly describes the adult Drosophila body parts and their corresponding axes?
A: The head is located at the anterior end, and the abdomen is at the posterior end, defining the dorsal-ventral axis.
B: The thorax is the mid-body, which bears wings and legs, and the right-left axis is perpendicular to the dorsal-ventral and anterior-posterior axes.
C: The adult fly has three major body parts: head, thorax, and abdomen, all of which are aligned along the dorsal-ventral axis.
D: The dorsal-ventral axis runs from head to tail, while the anterior-posterior axis runs from back to belly.
Explanation
The text states that adult Drosophila has three major body parts: head, thorax, and abdomen, and it possesses an anterior-posterior head-to-tail , dorsal-ventral back-to-belly , and right-left axis. The right-left axis is indeed perpendicular to the other two. Figure 18.19a shows the thorax as the mid-body section.