Porifera & Cnidaria

Question 1

Phylum Porifera

Answer 1

No true tissues or organs.
Sessile.
Structural support from Spicules.
Filter feeders.

Question 2

Phylum Cnidaria

Answer 2

Diploblastic (true tissues)
Radial body plan
Polyp (sessile) and Medusa (motile) forms
Tentacles with Cnidocytes

Question 3

Class Hydrozoa (Cnidaria)

Answer 3

• Alternate between medusa and polyp forms
• Sessile and often colonial
• Sexual reproduction, asexual budding
• Alternation of sexual and non-sexual forms

Question 4

Class Scyphozoa (Cnidaria)

Answer 4

• Medusa dominant (true jellyfish)

Question 5

Class Anthozoa (Cnidaria)

Answer 5

• Polyp stage only

- Individual (sea anenomes) or colonial (coral)

Question 6

Class Cubazoa (Cnidaria)

Answer 6

• Venomous