LAB: Cnidarians

Question 1

Cnidarians

Answer 1

• Flowers of the sea
• Diploblastic
• Incomplete Digestive system
• Predators

Question 2

Phylum Cnidaria

Answer 2

• 2 Forms
  
  • Medusa
  • ​Polyp

Question 3

Hydra - a solitary aquatic polyp

Answer 3

• Lack medusa stage
• only exist in polyp form

Question 4

Obelia - a polymorphic life cycle

Answer 4

• 2 types of polyps in colony
  
  • feeding polyp (tentacles surrounding mouth)
  • reproductive polyp ( produce tiny medusae by asexual budding)

Question 5

Sea Anemones - ​large polyps with no medusa stage

Answer 5

Question 6

Coral - Colonial polyps that secrete a calcareous cup

Answer 6

• Hard and Soft corals
  
  • ​​Sea Fan (soft coral)
• Corallite - ​protective calcareous cup

Question 7

Portuguese Man-o-War - a colonial polyp

Answer 7

Question 8

Jellies - free-swimming medusa stage dominates life cycle

Answer 8

• Benthic (bottom-dwelling) polyp stage of the life cycle is tiny