Question

A bilaterally symmetrical animal can be divided into mirror images by :
A. Any cut from its anterior to its posterior end
B. Any cut from its dorsal to its ventral surface
C. Only a cut through the midline of its body from its anterior to its posterior end
D. Only a cut through the midline of its body from its dorsal to its ventral surface.

Answer 1

Hint: Bilateral Symmetry is additionally referred to as - plane symmetry, and is seen in most of the animals.
This characteristic applies to around 99% of the animals, i.e., to more than half of the existing phyla.

Complete answer:
A huge number of living beings are bilaterally symmetrical, i.e., they can be easily segmented into mirror image (right and left) halves even by just one plane passing through the body’s midline.
This plane extends from its head or the body’s anterior to its tail or the body’s posterior.
Their internal organs do not seem to be essentially distributed symmetrically.
Animals which are bilaterally symmetrical, have well-defined left and right sides, a ventral aspect (bottom) and a dorsal aspect (top). They also exhibit the characteristic of Cephalization.
So, according to the information above :
Option a) Any cut from its anterior to its posterior end - is incorrect
Option b) Any cut from its dorsal to its ventral surface - is incorrect
Option c) Only a cut through the midline of its body from its anterior to its posterior end - is the Correct option.
Option d) Only a cut through the midline of its body from its dorsal to its ventral surface - is incorrect.

So, the correct answer is option C.

Note: For instance, the organism “beetle” features bilateralism.
Cephalization means that the sensory organs are concentrated at the body’s anterior end; a bodily arrangement mainly because of the use of forward motion by animals.
Thus, the anterior or the front end is the first area to encounter any type of stimuli in the environment, to which any organism must react.