Problem 34 - Objective Biology for NEET

Question

Another name of sycon is (a) Scypha (b) Euspongia (c) Spongilla (d) Hyalonema

Step-by-Step Solution

Answer

(a) Scypha

Step 1: Understand Taxonomy Terminology

When it comes to taxonomy, creatures might have a variety of names and classifications according to different parameters, such as their anatomical structure, habitat, and reproductive habits. In this case, we're looking for an another name of sycon.

Step 2: Recall Knowledge of Sponge Taxonomy

Sycon is a member of the Spongillidae family and it's also referred to as Scypha. The names Euspongia, Spongilla, and Hyalonema refer to other types of sponges.

Step 3: Answer the Question

Given the alternatives in the question, the option (a) Scypha is the another name for sycon.

Key Concepts

Sponge Taxonomy

Sponge taxonomy refers to the classification of sponges within the animal kingdom. Sponges, belonging to the phylum Porifera, are primitive, simple multicellular organisms that lack true tissues and organs. This uniqueness categorizes them distinctively from other animal groups.

Key aspects of sponge taxonomy include the following:

• Phylum: Porifera. This is one of the simplest animal phyla, indicating a lack of complex organs and systems.
• Classified by: Their skeletal structure (spicules made of silica or calcium carbonate), habitat, and sometimes coloration.
• Diverse Habitats: Sponges can be found in a wide range of environments from freshwater to marine ecosystems.

Sponges are also classified into various classes, including:

• Calcarea: Sponges with calcium carbonate spicules.
• Demospongiae: The largest class, often with spicules made of silicate.
• Hexactinellida: Known as glass sponges, having silica-based skeletons.

Understanding sponge taxonomy is crucial as it helps in identifying and differentiating sponges within the diverse Porifera group.

Scypha

Scypha is a term used synonymously with Sycon when referring to a particular type of sponge within the Spongillidae family. These sponges are relatively simple in structure and play an essential role in aquatic ecosystems. Here are some core characteristics of Scypha:

• Body Structure: Scypha sponges have a tubular or vase-like shape with an osculum (a large opening) at the top.
• Canal Systems: They consist of a simple canal system known as syconoid, facilitating the movement of water through their bodies for filtration.
• Habitat: Primarily marine environments, usually attached to rocks or coral reefs.
• Feeding: Filter feeders, meaning they draw water through their pores to extract nutrients.

The use of synonyms like Scypha and Sycon underscores the nuances in sponge taxonomy and helps refine the identification of sponge species across different regions.

Spongillidae Family

The Spongillidae family is a group within the Demospongiae class, primarily known for freshwater sponges. These sponges are adapted to live in non-marine environments, which sets them apart from many other sponge families. Key attributes of the Spongillidae family include:

• Habitat: Freshwater environments such as rivers, lakes, and streams, making them unique among predominantly marine sponges.
• Reproductive Adaptations: Many members of this family produce gemmules, which are survival pods that can endure harsh conditions such as drying or freezing.
• Skeletal Framework: Typically consists of siliceous spicules, often reinforcing a spongy network called spongin.

Being members of Spongillidae signifies the evolutionary traits and survival strategies enabling them to prosper in freshwater habitats, contributing significantly to aquatic biodiversity.