Echinodermata and Hemichordata Lab Prac. 3

Question 1

Answer 1

cs Sea Star arm slide

Question 2

What are pedicellariae?

Answer 2

Question 3

What does the image show?

Answer 3

Sea Star development including:

1. unfertilized egg
2. zygote
3. radial cleavage
4. blastula
5. gastrula

Question 4

What kind of larva are displayed in the image below?

Answer 4

bipinaria larva (has bilateral symmetry)

Question 5

What type of larva is shown in the image below?

Answer 5

brachiolaria larva (different from bipinnaria because it has arms and its own gut)

Question 6

What animal does the image depict and to what Class does it belong?

Answer 6

Sea lily

Crinoidea

Question 7

What three structures do you need to know for the practical from the image below?

Answer 7

calyx, arm, pinnules

Question 8

What is shown in the image below?

Answer 8

A sand dollar with five “doves” or “angel wings” which make up it’s mouthparts.

Question 9

What is the structure displayed in the image called?

Answer 9

Spines

Question 10

What is the test in regards to Echinoids?

Answer 10

Shell or covering

Question 11

What is the name of the specimen in this jar?

Answer 11

A sea cucumber

Question 12

Describe the water vascular system of sea stars and name the parts.

Answer 12

See image below.

Question 13

What organism is depited below?

Answer 13

Balanoglossus, a Hemichordate and acorn worm.

Question 14

What animal is depicted below?

Answer 14

Saccoglossus, a Hemichordate and acorn worm

Question 15

Name the basic parts of an acorn worm (Balanoglossus.)

Answer 15

See image below