Sponges and Cnidarians

Question 1

Sponge Phylum

Answer 1

Porifera

Question 2

what are the characteristics of Sponges?

Answer 2

• Tiney opening or so called pores all over body
• Most ancient animal
• No true tissues or organs
• No body symmetry
• Sessile = only in larvae stage

Question 3

What are sponges specialized cells?

Answer 3

Choanocytes are flagellated cells that create current through the sponge + also used in feeding

Question 4

What is the structure of a sponge?

Answer 4

Spongin = fibrous protein made of collagen and we as humans use these sponges for cleaning daily

Spicules = skeleton of needle - like spines + can be made of calcium or silla

Question 5

What phylum are Jellyfish in?

Answer 5

Scyphozoa

Question 6

What Phylum are Box Jellyfish in?

Answer 6

Cubozoa

Question 7

What Phylum are Hydras in?

Answer 7

Hydrozoa

Question 8

What Phylum are Sea Fans + Anemones + Corals in?

Answer 8

Anthozoa

Question 9

What is Cnidarians meaning?

Answer 9

Their Stinging abilities

Question 10

What are some characteristics of Cnidaria?

Answer 10

• Aquatic
• Soft Bodied
• True Tissues
• Diploblastic - 2 layers (endoderm + Ectoderm + Mesoglea (Between the two layers)
• Carnivorous
• Gastrovascular cavity (one opening)
• Radial Symmetrical

Question 11

What are the two body forms for cnidaria?

Answer 11

Polyps: Like Corals or Corn tops
Medusa: Kind of like Jellyfish

Question 12

what are specialized cell structures of cnidarians?

Answer 12

Cnidocytes are what cells use to attach + feed + defend

contain cnidae + Nematocysts are just stinging cnidae

Question 13

What are Corals and Zooxanthellae?

Answer 13

• Symbiotic algae that provides food for the coral through photosynthesis
• Found in reef building corals
• Makes corals their color

Question 14

what are Coral Reefs and Coral Reef health?

Answer 14

• Stony corals have calcium skeletons
• Reef Building
• Creates a very diverse ecosystem