Chapter 34 -9

Question 1

Characteristics of starfish?

Answer 1

move w/ tube feet
consume shellfish & coral
use water pressure & stomach emersion
reproduce externally

Question 2

What is the great barrier reef?

Answer 2

1200 mile coral reef along north east coast of australia

Question 3

How does the great barrier reef work?

Answer 3

each coral polyp secretes a calcium exoskeleton that builds up each generation

Question 4

What is consuming the polyps and killing the reef?

Answer 4

crown of thorns starfish

Question 5

What is the crown of thorns starfish?

Answer 5

large starfish w/ 10-14 arms

reproduces quickly and can regenerate from body pieces

Question 6

What is the predator of the crown of thorns?

Answer 6

the triton snail

Question 7

What does the class echinoidea consist of?

Answer 7

urchins & sand dollars

Question 8

What are the characteristics of class echinoidea?

Answer 8

elongated spines - no arms
move w/ tube feet
biting mouth for grazing on algae
shells have some commercial value

Question 9

What does the class holothuroidea consist of?

Answer 9

sea cucumbers

Question 10

What are the characteristics of the class holothuroidea?

Answer 10

worm- like grows to over 6 feet
body is muscular sac
modified tube feet around mouth
saprovore
eviscerate & regenerate
red anal tubes for defense