Final Answer:
Annelida typically exhibits true metameric segmentation, while Arthropoda's segmentation tends to be more specialized. Annelids display repeated, similar segments, while arthropods have modified and fused segments for specific functions, reflecting their distinct adaptive strategies.Thus b is the correct option.
Step-by-step explanation:
Phylum Annelida and Phylum Arthropoda exhibit distinct segmentation characteristics. Annelids, such as earthworms, display true metameric segmentation, where the body is divided into repeated segments, each containing similar organ systems.
This segmentation facilitates flexibility and efficient movement. In contrast, Arthropods, including insects and crustaceans, possess a more specialized form of segmentation. While they also have a segmented body, their segments are often fused or modified for specific functions, such as the head, thorax, and abdomen in insects. This specialization is a key adaptation that enhances their diverse locomotion and ecological roles.
The metameric segmentation in Annelida is evident through the repetition of similar body segments, each housing a set of organs and structures. This repetition reflects a basic organizational pattern throughout the body. On the other hand, Arthropods display a more intricate segmentation where certain segments are modified for specific functions like walking, feeding, and reproduction.
The specialized segmentation in Arthropoda corresponds to their diverse lifestyles and ecological roles. It allows for the differentiation of body regions, enabling adaptation to various environments and ecological niches.
In summary, while both Annelida and Arthropoda exhibit segmentation, the nature of segmentation differs between the two phyla. Annelida showcases true metameric segmentation, emphasizing repetition, whereas Arthropoda's segmentation is specialized, reflecting adaptations for diverse ecological functions.
Therefore b is the correct option.