Make a well-labeled diagram of Cnidarian Polyp and Medusa forms and state three differences between them.

5. Make a well labelled diagram of Polyp and Medusa form of Cnidarian.

I cannot draw diagrams. However, a well-labeled diagram of a Polyp should include:

• Mouth/Anus
• Tentacles
• Gastrovascular cavity
• Epidermis (outer layer)
• Gastrodermis (inner layer)
• Mesoglea (gelatinous layer)
• Pedal disc (base for attachment)
• Column (body stalk)

A well-labeled diagram of a Medusa should include:

• Mouth/Anus
• Tentacles
• Gastrovascular cavity (including radial canals and ring canal)
• Epidermis (outer layer)
• Gastrodermis (inner layer)
• Mesoglea (thick, gelatinous layer)
• Bell (umbrella-shaped body)
• Manubrium (stalk-like structure bearing the mouth)

5b. State three (3) differences between the Polyp and Medusa.

Polyp	Medusa
i. Sessile (attached to a substrate)	Free-swimming
ii. Cylindrical body shape	Bell-shaped or umbrella-shaped body
iii. Mouth and tentacles face upwards	Mouth and tentacles face downwards
iv. Thin mesoglea	Thick, gelatinous mesoglea
v. Primarily reproduces asexually	Primarily reproduces sexually

6. State five ecological roles of Cnidarians.

i. They are primary reef builders, forming complex coral reef ecosystems that support vast biodiversity.
ii. They provide habitat and shelter for numerous marine organisms, including fish, crustaceans, and other invertebrates.
iii. They serve as a food source for various marine animals, such as sea turtles, nudibranchs, and some fish.
iv. As predators, they help regulate populations of small fish and zooplankton in marine food webs.
v. Many cnidarians form symbiotic relationships, such as corals with zooxanthellae (algae) for nutrient production, and sea anemones with clownfish for protection.