Parazoa And Metazoa

Question 1

Platyhelminthes AKA

Answer 1

Flatworm

Question 2

Nematoda AKA

Answer 2

Round worms

Question 3

Cnidarians AKA

Answer 3

Coelenterates

Question 4

What is the single phylum in Parazoa?

Answer 4

Phylum porifera

Question 5

Porifera AKA

Answer 5

Sponges

Question 6

Xtics of porifera?

Answer 6

• sponges

• Most primitive multicellular

• Adults are sessile

• Hermaphrodites

• major body opening is EXHALANT( osculum) ••••

Question 7

What were porifera named based on

Answer 7

Have incessant pores on body surface called OSTIA.

Ostia is linked to inhalant canals.

Question 8

What is the major body opening in porifera?

Answer 8

EXHALANT — OSCULUM

Question 9

Why are Porifera often colored?

Answer 9

Due to interactions with symbiotic algae.

Question 10

What is the layer lining the internal ceolom of Porifera called ?

Answer 10

Gastral layer / choanoderm

Question 11

What is the choanoderm composed of in porifera?

Answer 11

Collared flagellated cells called CHOANOCYTES

Question 12

Reproduction is

Answer 12

Asexual and sexual

Question 13

Amphiloblastula is

Answer 13

One of the diff. larval forms in porifera

Question 14

Classes under Phylum porifera

Answer 14

Calcarea ( skeleton consists of calcareous spicules)

Hexactinellida (six-rayed spicules)

Demospongiae (no skeleton, jelly filled choanocytes)

Sclerospongiae (leuconoid marine)

Question 15

What is leuconoid?

Answer 15

Whitish

Question 16

Porifera means

Answer 16

Bearing pores

Pore - bearing

Question 17

What is the single phylum in parazoa?

Answer 17

Porifera

Question 18

Phylum Porifera is also called

Answer 18

Sponges

Question 19

Which are the most primitive multicellular animals?

Answer 19

Parazoa

Question 20

Porifera adults are mainly

Answer 20

Sessile and attached to rock surfaces

Question 21

What is the primary opening in Parazoans/ Porifera?

Answer 21

EXHALANT

Question 22

Sexual nature of Porifera?

Answer 22

Hermaphroditism

Question 23

Four phylum under Porifera

Answer 23

Calcarea- calcareous spicules

Hexactinellida- six rayes silíceous spicules

Demospongiae- no skeleton or if present doesn’t have six rayed spicules

Sclerospongiae- leuconoid

Question 24

Levels of organization in Metazoa

Answer 24

Diploblastic

Triploblastic

Question 25

Principal opening in Metazoa

Answer 25

Inhalant

Question 26

What line the ceolom of Metazoa

Answer 26

Endoderm cells NOT choanocytes

Question 27

Diploblastic body in Metazoa is attained by

Answer 27

Cnidarians (coelenterates)

Question 28

Phyla in Metazoa

Answer 28

Cnidaria- coelenterates Mollusca- Platyhelminthes- flatworms Nematoda- round worms Arthropoda Echinodermata

Question 29

Xtics of phylum Cnidaria

Answer 29

- coelenterates - single ceulom called ENTERON - mouth surrounded by tentacles - tissue level of organisation - radial symmetry - sedentary or free swimmers - asexual by budding

Question 30

Nematocysts in Cnidaria serve for

Answer 30

Defense and capture, found on tentacles.

Question 31

The single ceolom in Cnidaria is

Answer 31

ENTERON for ingestion and digestion

Question 32

Polymorphism is exhibited by

Answer 32

Cnidaria

Question 33

What forms do Cnidaria show in polymorphism?

Answer 33

Hydroid(polyp) Medusoid

Question 34

The medusoid in Cnidaria are

Answer 34

Free swimming

Question 35

The hydroids (polyp) forms in Cnidaria are

Answer 35

Sedentary/ solitary/ colonial

Question 36

The 3 classes under Cnidaria are

Answer 36

Hydrozoa Schyphozoa Anthozoa

Question 37

Xtics of class hydrozoa

Answer 37

- polyp(hydroid) and medusoid forms present - hydroid is predominant, Medusa the simplest stage - reproduction by alternation of asexual and sexual phases

Question 38

Examples of class hydrozoa.

Answer 38

Hydra, Physalia (Portuguese man of war)

Question 39

Xtics of class scyphozoa

Answer 39

Nematocysts in the ectoderm No gullet Exclusively marine Hydroid stage often absent or reduced to small larvae, gives rise to Medusa by TRANSVERSE FISSION

Question 40

Examples of class scyphozoa

Answer 40

Aurelia ( jellyfish) Pelagia

Question 41

Xtics of class Anthozoa

Answer 41

Exclusively marine Largest class in Cnidaria Only polyps/ hydroids occur Nematocysts in endoderm

Question 42

Examples of class Anthozoa

Answer 42

Actinia- sea anemone Astrangia- coral