Porifera

Question 1

Meaning behind porifera

Answer 1

Pore bearing

Question 2

Characteristics of sponges

Answer 2

Assymetrical, 2 cell layers, lacking tissues + muscles and nerves, filter feeders

Question 3

Flattened cell making up the epidermis of the sponge
Maintains size and structure by slight expansions and contractions

Answer 3

Pinacocyte

Question 4

Elongated tube like cell that creates pores in sponges

Answer 4

Porocyte

Question 5

Flagrllated cell in sponges with cytoplasmic extensions

Answer 5

Choanocyte/collar cell

Question 6

Cell in sponges that aid in water flow, capturing/filtering food, and capture of gametes

Answer 6

Choanocyte/collar cell

Question 7

Cells that exhibit totipotency (can change into different types)

Answer 7

Archeocytes

Question 8

Cells that form spiricles

Answer 8

Archeocytes

Question 9

Class of sponges that are found in shallow marine water, have spicules made entirely of calcium carbonate, and the only class with the asconoid form

Answer 9

Class calcarea

Question 10

Class of massive sponges with spicules made of silica and spongin. Body form is predominantly leuconoid.
Only class with a freshwater species

Answer 10

Class demospongia

Question 11

Class of sponges with Spiricles made of silica fibers, and no definitive layers.
Able to conduct electrical impulses to respond to external stimuli

Answer 11

Class hexactinellida/ the glass sponges

Question 12

Class of sponges that are massive and encrusting with very few and unique spiricles

Answer 12

Class homoscleromorpha

Question 13

T/F
Adult sponges lack nerve cells

Answer 13

True

Question 14

How can sponges move

Answer 14

Contractions of the pinacocytes, flushing sediments from ostia

Question 15

Forms of sexual reproduction in sponges

Answer 15

Hermaphroditism, internal fertilization

Question 16

bringing forth live young that have developed inside the body of the parent

Answer 16

Viviparous

Question 17

Type of sponge larvae that is hollow and oval, with the anterior half bearing flagella and the posterior half free from flagella

Answer 17

Amphiblastula

Question 18

Type of sponge larvae that is solid, oval or flattened, and covered in flagella

Answer 18

Parenchymula

Question 19

Cells found in sponge larvae that may provide sensory capability in sponge larvae and contain genes important for signal receiving structure in the neurons of all animals

Answer 19

Flask cells

Question 20

Empty space within the sponge

Answer 20

Spongocoel

Question 21

A gelatinous, non living layer of material in sponges

Answer 21

Mesohyl

Question 22

The support elements in sponges that can be calcarious or siliceous

Answer 22

Spicules

Question 23

Water flows into the spongocoel through narrow ___ and exits through larger ___

Answer 23

Ostia, oscula

Question 24

Body forms in sponges

Answer 24

Asconoid, syconoid & leuconoid

Question 25

Fibrous material found in sponges

Answer 25

Spongin

Question 26

Flagellated cells that control water flow through the sponge

Answer 26

Chaonocytes

Question 27

Most complex sponge body form

Answer 27

Leuconoid

Question 28

Phylum of metazoans with the simplest body form that filter feed

Answer 28

Porifera

Question 29

Simplest sponge body form

Answer 29

Asconoid

Question 30

Neither the most nor least complex sponge body form

Answer 30

Syncoid

Question 31

outward opening of sponges where water flows out

Answer 31

osculum

Question 32

opening in sponges where water flows in

Answer 32

ostium

Question 33

small ball-like structure left behind that develop into new sponge when in favorable conditions

Answer 33

reduction bodies

Question 34

internal buds formed within the sponge body

Answer 34

gemmules