SCIENCE
ZOOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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no lines can be drawn that divide it into even halves
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many lines can be drawn to create mirror images
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one line can be drawn to create mirror images
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any line through the center creates mirror images
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Detailed explanation-1: -To determine whether an animal has bilateral symmetry, it is possible to draw an imaginary (or real!) line down the center from its tip to the end; a bilaterally symmetrical animal will have two sides which are near identical, albeit a mirror image.
Detailed explanation-2: -Bilateral symmetry involves the division of the animal through a sagittal plane, resulting in two mirror-image, right and left halves, such as those of a butterfly, crab, or human body. Animals with bilateral symmetry have a “head” and “tail” (anterior vs. posterior), front and back (dorsal vs.
Detailed explanation-3: -Bilateral symmetry is characteristic of the vast majority of animals, including insects, fishes, amphibians, reptiles, birds, mammals, and most crustaceans.
Detailed explanation-4: -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.
Detailed explanation-5: -A condition in which the right and left sides of an item (e.g., a shape or an animal) are mirror images of one another. For example, since the right side of the human body generally mirrors the left side, humans are bilaterally symmetric.