Bilateral symmetry in animals is best correlated with
a. An ability to see equally in all directions.
b. The presence of a skeleton.
c. Motility and active predation and escape.
d. Adaptation to terrestrial environments.

Verified step by step guidance

1. Understand the concept of bilateral symmetry: Bilateral symmetry refers to the arrangement of body parts in such a way that an organism can be divided into two identical halves along a single plane. This is common in animals that have a distinct head and tail region, as well as a left and right side.
2. Consider the advantages of bilateral symmetry: Animals with bilateral symmetry often have a centralized nervous system and sensory organs concentrated at the front (anterior) end, which aids in directional movement and environmental interaction.
3. Analyze the options provided: Evaluate each option to determine which one aligns best with the characteristics and advantages of bilateral symmetry. For example, motility and active predation are closely linked to the ability to move efficiently and respond to stimuli, which is facilitated by bilateral symmetry.
4. Eliminate incorrect options: For instance, the ability to see equally in all directions is more characteristic of radial symmetry, not bilateral symmetry. Similarly, the presence of a skeleton and adaptation to terrestrial environments are not exclusive to bilateral symmetry.
5. Select the most relevant option: Based on the analysis, identify the option that best correlates with the advantages of bilateral symmetry, such as motility and active predation or escape behaviors.

Key Concepts

Bilateral Symmetry

Bilateral symmetry refers to a body plan in which an organism can be divided into two identical halves along a single plane, typically the sagittal plane. This symmetry is common in many animals, including humans, and is associated with a streamlined shape that facilitates movement and orientation in their environment.

Motility and Active Predation

Motility is the ability of an organism to move independently and actively in its environment. In animals with bilateral symmetry, this trait often correlates with predatory behaviors, as it allows for directional movement and enhanced sensory perception, aiding in hunting and escaping from predators.

Adaptation to Terrestrial Environments

Adaptation to terrestrial environments involves physiological and structural changes that enable organisms to thrive on land. Bilateral symmetry can facilitate these adaptations by promoting efficient locomotion and sensory processing, which are crucial for survival in diverse terrestrial habitats.