Phylum Porifera

Question 1

habitat of sponges

Answer 1

marine

Question 2

habit of sponges

Answer 2

solitary or colonial

Question 3

cells that compose sponges

Answer 3

pinacocyte, porocyte, amoebocyte, choanocyte, oocyte, lophocyte, sclerocyte

Question 4

germ layers of a sponge

Answer 4

endoderm, ectoderm, and mesoglea (gelatinous matrix)

Question 5

has numerous perforations for the entry of water

Answer 5

ostia

Question 6

a large pore at the apex or top for the exit of the water

Answer 6

osculum

Question 7

between Ostia and osculum

Answer 7

spongocoel

Question 8

what system is present in sponges?

Answer 8

water canal system

Question 9

small needle-like or sharp-pointed structures of calcite or silica that make up the skeleton of a sponge

Answer 9

spicules

Question 10

sponges’ way of eating

Answer 10

filter-feeding

Question 11

reproduction and sex of a sponge

Answer 11

asexual and sexual; hermaphroditic

Question 12

what do sponges do to reproduce sexually?

Answer 12

role play to decide who will play what sex

Question 13

how do sponges reproduce asexually?

Answer 13

budding

Question 14

controls water flow through Ostia

Answer 14

porocyte

Question 15

forms outer covering of the sponge

Answer 15

pinacocyte

Question 16

egg cell

Answer 16

oocyte

Question 17

delivers nutrients to cells

Answer 17

amoebocyte

Question 18

secretes collagen

Answer 18

lophocyte

Question 19

secretes silica spicules

Answer 19

sclerocyte

Question 20

classes under Phylum Porifera

Answer 20

Calcarea, Hexactinellida, Demospongiae, Sclerospongiae

Question 21

glass sponges
“the most beautiful sponge in the world”
spicules made up of silica

Answer 21

Class Hexactinellida

Question 22

cellular sponges

spicules made up of calcium carbonate

Answer 22

Class Calcarea

Question 23

most diverse class of sponges

Answer 23

Class Demospongiae

Question 24

made up of calcium carbonate, silica, and spongia

Answer 24

Class Sclerospongiae