Biodiversity 5

Question 1

Chanoflagellaes

Answer 1

Aquatic: filter deed on bacteria, unicellular sister group to the animals
Synapomorphy: collar of sticky tentacles.

Question 2

Sponges

Answer 2

aquatic, almost all marine, mostly sessile, multicellular, but not eumetazoa.
Synapomorphy: mineral spicules
They do not have trye layers so they do not hjave endoerm or ectoderm

Question 3

Eumetazoans

Answer 3

have gastrulation, true tissues, symmetrical body plan, internal gastrovascular system

Question 4

Ctenophores

Answer 4

all marine, predators, radial symmetry, flow through gut
Synapormorhy: 8 combs
no mesoderm

Question 5

Cnidaria (jellyfish, hydras, anemones)

Answer 5

all aquatic, almost all marine, polyp, or medudsa, radial symmteyr, no flow through gut- no mesoderm
Syna: cnidocytes

Question 6

Dinoflagellates

Answer 6

perform photosynthesis to provide sugar (up to 90% of coral energy)

Question 7

Cnidarian + Bilaterians

Answer 7

they are united by having hox genes, set of genes that code for transcription factors contribute to development

Question 8

Lophotrochoza

Answer 8

flatworms, annelids, and mollusks

Question 9

Flatworms

Answer 9

Degree of Cephalization: there is some cephalization
Type of Circulatory System:
no circulatory system
Type of body cavity: acoelomate

Question 10

Annelids

Answer 10

Degree of Cephalization: there is some cephalization
Type of Circulatory System
closed circulatory system
Type of body cavity:
coelomate

Question 11

Mollusks

Answer 11

Degree of Cephalization: there is more cephalization, particularly in cephalopods
Type of Circulatory System:
Have open circulatory system
Type of body cavity:
coelomate

Question 12

Annelids

Answer 12

Characteristics:
Segmentation, closed circulatory system
Coelomate: digestive tube with two openings
Chitinous setaw

Question 13

Mollusks

Answer 13

include bivalves, gastropods, and cephalopods
Synapo: muscular foot, visceral mass, mantle have different forms and functions in each group