echinoids

Question 1

echinoid PHYLUM

Answer 1

echinodermata

Question 2

echinoid CLASS

Answer 2

echinoidea

Question 3

two types of echinoid

Answer 3

regular and irregular

Question 4

what is ecnoid skeleton called

Answer 4

the test

Question 5

what is the echinoid test made of

Answer 5

interlocking plates of calcite

Question 6

what are the two areas of echinoid test called

Answer 6

ambulacra and interambulacra

Question 7

how do you tell echinoid ambulacra and interambulacra apart?

Answer 7

ambulacra - pore pairs

interambulacra - tubercles

Question 8

what way up were (reg) echinoids

Answer 8

mouth down booty up`

Question 9

what was echinoid pore pair

Answer 9

allow tube feet to protrude

Question 10

what were echinoid tube feet used for

Answer 10

movement, attachment and RESPIRATION

Question 11

what was the echinoid madreporite for

Answer 11

taking in water for the water vascular system

Question 12

what was the genital plate in echinoids used for

Answer 12

to release sperm and eggs into water column

Question 13

what was the echinoid Aristotle lantern

Answer 13

5 chisel like teeth in mouth

Question 14

did both types of echinoid ( reg and ireg) have an aristotole lantern

Answer 14

just regular

Question 15

what makes an irregular ecinoid

Answer 15

PETALOID AMBULACRA - one lines up to mouth making heart shape
there are 5 petaliod ambulacra

Question 16

what is the plastron (irregular echinoid)

Answer 16

area covered with tubercles for attachment of small spines to dig burrows

Question 17

what is the labrum (irregular echinoid)

Answer 17

lip protruding over part of the mouth to block sediment

Question 18

REG echinoid mode of life

Answer 18

benthonic, epifaunal

high energy

Question 19

REG echinoid feeding

Answer 19

uses jaws (aristole lanterns) to graze algae on sea bed

Question 20

reg echinoid symmetry

Answer 20

5 fold

Question 21

REG echinoid ambulacra and interambluacra

Answer 21

run from the centre of the aboral (anus) surface to the oral surface

Question 22

REG echinoid function of tube feet

Answer 22

respiration attachment and movement

Question 23

do REG echinoid have fascioles?

Answer 23

NO!

Question 24

IREGULAR echinoid mode of life

Answer 24

benthonic, infaunal
live in burrows
low energy

Question 25

IREGULAR echinoid where are the cilia and what do they do?

Answer 25

in anterior groove, used to generate currents to waft waste from mouth to anal tube

Question 26

IREGULAR echinoid wat is anterior groove?

Answer 26

where (one) petaloid ambulacra meets the mouth and makes a dent

Question 27

IREGULAR echinoid feeding

Answer 27

particle feeding, extracts microrganisms from sea water

Question 28

IREGULAR echinoid symmetry

Answer 28

bi lateral (1 PLANE)

Question 29

IREGULAR echinoid ambulacra

Answer 29

run from the centre of the aboral surface but terminate forming petaloid ambulacra

Question 30

IREGULAR echinoid interambulacra

Answer 30

modified over test surface
fused together over oral surface
one forms the plastron

Question 31

IREGULAR echinoid function of tube feet

Answer 31

respiration, digging, burrowing and anal tube

Question 32

IREGULAR echinoid fascioles

Answer 32

two present, one to direct water to mouth and one to direct waste away from the echioid

Question 33

REGULAR echinoid what is apical system

Answer 33

10 plates in 2 rings around anus

5 genital plates (largest is madreporite)

Question 34

REGULAR echinoid what is madreporite

Answer 34

largest gential plate, takes in water for the water vascular system

Question 35

REGULAR echinoid what is a periproct

Answer 35

membrane surrounding anus