The unusual nucleoside spongothymidine is isolated from ——-- | Agrigyan

• Classification and Natural Products of Gorgonians:
• Gorgonians (order Alcyonacea, subclass Octocorallia, Phylum Cnidaria) are commonly known as sea fans, sea whips, or soft corals.
• They possess an internal flexible axis composed of gorgonin protein.
• Gorgonians are renowned prolific sources of unique secondary metabolites, particularly diterpenes and sesquiterpenoids (e.g., pseudopterosins, lophotoxin) possessing potent anti-inflammatory and analgesic activities.
• nalysis:
• (soft corals): Correct.

Correct option: (3) soft corals

• Intergeneric Hybridization in Salmonids:
• Tiger trout is a man-made intergeneric hybrid produced by fertilizing the eggs of the Brown trout (Salmo trutta) with the milt of the Brook trout (Salvelinus fontinalis).
• Because the parents belong to two completely distinct genera (Salmo and Salvelinus), it is an intergeneric hybrid.
• Tiger trout exhibit distinctive vermiculated, tiger-like stripes across their flanks and are sterile triploids ($3n$) or diploids with defective gametogenesis.
• nalysis:
• (Intergeneric hybrid): Correct.

Correct option: (2) Intergeneric hybrid

• Gram Staining Characteristics:
• Gram-Positive: Possess a thick, multilayered peptidoglycan cell wall containing teichoic acids that retains crystal violet stain.
• Bacillus (e.g., Bacillus subtilis, Bacillus licheniformis) is a genus of Gram-positive, endospore-forming rod-shaped bacteria widely used as probiotics in aquaculture.
• Gram-Negative: Possess a thin peptidoglycan layer enclosed by an outer membrane rich in lipopolysaccharides (LPS).
• Vibrio, Pseudomonas, and Salmonella are all Gram-negative.
• nalysis:
• (Bacillus): Correct.

Correct option: (2) Bacillus