Final answer:
Spiral symmetry does not describe axes of symmetry in animals; recognized forms include bilateral, radial, and asymmetry.
Step-by-step explanation:
Among the options provided, spiral symmetry (d) does not describe an axis of symmetry in animals. In biology, the main types of symmetry observed in animals are bilateral symmetry, radial symmetry, and asymmetry. Bilateral symmetry refers to organisms with a left and a right side that are mirror images of each other, such as a goat. Radial symmetry refers to animals like jellyfish and sea anemones, which have body plans that allow for multiple planes of symmetry through a central longitudinal axis. Asymmetrical organisms, such as sponges, have no pattern or symmetry and cannot be divided into similar halves along any plane. Spiral symmetry is not a recognized form of symmetry in animal body plans.
Bilateral symmetry, radial symmetry, and spiral symmetry are all examples of axes of symmetry in animals. The correct answer is c) Asymmetry. Asymmetrical organisms have no distinct pattern or symmetry, whereas bilaterally and radially symmetric organisms can produce equal halves if cut along a certain plane.