BIO EXAM 3 LEC 14

Question 1

what are the earliest deuterostomes

Answer 1

echinoderms

Question 2

echinoderms are

Answer 2

DEUTEROSTOMES

Question 3

echinoderms live in

Answer 3

marine habiotats

Question 4

echinoderms have

Answer 4

Water vascular system

Question 5

water vascular system

Answer 5

locomotion, food / waste transportation

Question 6

echinoderms show

Answer 6

evolutionary reversals

Question 7

echinoderms evolutionary reversals:

Answer 7

radial symmetry, radial nerves (no CNS), little to no
cephalization, no excretory organs

Question 8

echnioderms have what kind of body

Answer 8

triploblastic

Question 9

echinoderms Endoskeleton contains millions of

Answer 9

calcium carbonate components called
ossicles

Question 10

echinoderms have what for protection

Answer 10

spines, spicules

Question 11

what kind of digestive system do echinoderms have

Answer 11

Complete digestive system

Question 12

echinoderms have what kind of reproduction

Answer 12

asexual

Question 13

echinoderms can regenerate

Answer 13

tissues

Question 14

echinoderms body fluid circulation by

Answer 14

cilia

Question 15

echinoderms blood vasular system is

Answer 15

reduced

Question 16

how many classes are in the phylum echinoderms?

Answer 16

5

Question 17

what are the 5 classes in echinoderms (Each-O)

Answer 17

Echinoidea
Asteroidea
Crinoidea
Holothuroidea

Ophiuroidea

Question 18

asteroidea have

Answer 18

sea stars

Question 19

echinoidea have

Answer 19

sea urchins, sand dollars

Question 20

crinoidea have

Answer 20

sea lillies, feather stars

Question 21

holothuroidea have

Answer 21

sea cucumbers

Question 22

ophiuroidea

Answer 22

brittle stars

Question 23

crinoidea mobility

Answer 23

move around till they find a place to stay then become sessile

Question 24

ophiuroidea found in

Answer 24

benthic marine habitats

Question 25

what kinda of feet do Ophiuroidea. have

Answer 25

tube feet

Question 26

sea cucumbers characteristics(holothuroidea)

Answer 26

Sea cucumbers, 1150 spp.
- Greatly elongated in the oral-aboral axis
- Soft bodied
- Sea floor, beneath rocks, burrowing
- Bizarre defense mechanisms (morphological,
behavioral, and physiological defenses)

Question 27

What are Ossicles?

Answer 27

They are spines/spicules (similar to sponges) that is used for protection

Question 28

Ambulacral grooves

Answer 28

Give each arm their hardened structure

Question 29

Why do sea stars undergo autotomy?

Answer 29

o protect against viruses, to escape predators, and for reproduction

Question 30

benthic

Answer 30

Anything occurring or associated with the bottom of a body of water

Question 31

What is the major difference between Brittle stars and sea stars?

Answer 31

Brittle stars have their madreporite located on the oral side of their body and sea stars have the madreporite located on the aboral side.

Question 32

What is an example of a Behavioral defense mechanisms that Holothuroidea utilize?

Answer 32

burroe themselves

Question 33

autotomy

Answer 33

self amputation