What is a lophophore? a. a specialized filter-feeding structure b. the single opening in species with a blind gut c. a distinctive type of larva with a band of cilia d. a synapomorphy that defines lophotrochozoans

Verified step by step guidance

1. Identify the term 'lophophore' and understand its biological significance.
2. Recognize that a lophophore is a structure related to feeding mechanisms in certain aquatic invertebrates.
3. Analyze the options given: a specialized filter-feeding structure, a single opening in species with a blind gut, a type of larva, and a defining characteristic of a specific group.
4. Consider the function of a lophophore, which involves capturing food particles from water, and relate it to the options provided.
5. Select the option that correctly describes the lophophore as a structure associated with feeding.

Key Concepts

Lophophore

A lophophore is a specialized feeding structure found in certain aquatic invertebrates, primarily within the phyla Brachiopoda and Bryozoa. It consists of a crown of ciliated tentacles that trap food particles from the water, allowing these organisms to filter-feed efficiently. The presence of a lophophore is a key characteristic that helps in identifying and classifying these animals.

Lophotrochozoans

Lophotrochozoans are a major clade of protostome animals that include diverse groups such as mollusks, annelids, and the aforementioned lophophorates. This group is defined by the presence of either a lophophore or a trochophore larval stage, which is characterized by a band of cilia. Understanding this classification is essential for recognizing evolutionary relationships among these organisms.

Filter Feeding

Filter feeding is a method of feeding where organisms extract food particles from water by filtering it through specialized structures. In the context of lophophores, the ciliated tentacles create water currents that bring food particles closer, allowing the organism to capture and consume them. This feeding strategy is crucial for many aquatic invertebrates, enabling them to thrive in various marine environments.