Lesson 21 Lecture notes

Question 1

Animals in Phylum Cnidaria get their name from their cnidocytes which are…

Answer 1

stinging cells

Question 2

Cnidarians all have 2 germ layers which together make up their…

Answer 2

Epithelial cells- nerve cells and contractile cells

Question 3

A cnidarian that is sessile, cup-shaped, has a mouth and tentacles at one end, and a sticky base that attaches to a hard surface on the other end is called…

Answer 3

Polyp

Question 4

A cnidarian that is motile with an umbrella-shaped body with its mouth facing downward and tentacles extending around it is called…

Answer 4

Medusa

Question 5

Hydra are part of which class of cnidarians?

Answer 5

Hydrozoa

Question 6

Hydra are part of which class of cnidarians?

Answer 6

Hydrozoa

Question 7

Jellyfish are part of which class of cnidarians?

Answer 7

Scyphozoa

Question 8

Coral are part of which class of cnidarians?

Answer 8

Anthozoa

Question 9

Echinoderm means…

Answer 9

Spiny skin

Question 10

Sea stars are part of which class of echinoderms?

Answer 10

Asteroidea

Question 11

Brittle stars are part of which class of echinoderms?

Answer 11

Ophiuroidea

Question 12

Sand dollars are part of which class of echinoderms?

Answer 12

Echinoidea

Question 13

Sea cucumbers are part of which class of echinoderms?

Answer 13

Holothuroidea

Question 14

Echinoderms do NOT have which of the following systems?

a. Respiratory system
b. Water vascular system
c. Digestive system
d. Circulatory system

Answer 14

a. Respiratory system

Question 15

Echinoderms use _______ for capturing prey, eating, and movement.

Answer 15

tube feet

Question 16

_______ is only found in animals or organisms in Phylum Echinodermata.

Answer 16

Water vascular system

Question 17

Phylum Cnidaria all have

Answer 17

soft bodies that exhibit radial symmetry

Question 18

Nerve cells

Answer 18

Nerve cells sense outside stimulus and coordinate the animal’s response

Question 19

Contractile cells

Answer 19

bend the organism’s body allowing it to move through the water.

Question 20

Phylum cnidaria have two…

Answer 20

body forms- polyp and medusa

Question 21

Which is sessile and which is motile?

1. Polyp
2. Medusa

Answer 21

1. Polyps - sessile

2. Medusa - Motile

Question 22

The Cnidaria have stinging cells on their tentacles called…

Answer 22

cnidocytes

Question 23

Cnidaria have a digestive system with

Answer 23

one opening

Question 24

Cnidaria have what kind of respiratory and circulatory systems?

Answer 24

None

Question 25

Jellyfish reproduce using —–

Answer 25

alternation of generations

Question 26

how do sea anemones release their nematocysts?

Answer 26

chemical recognition

Question 27

Hydra reproduce

Answer 27

asexually via budding, sexually gametes released into the water

Question 28

Phylum echinoderms have

Answer 28

(Star fish, shellfish)

water vascular systems and tube feet

Question 29

Echinodermata (sea stars, sea urchins) have endoskeletons made of

Answer 29

plates called ossicles

Question 30

Echinodermata have what sort of circulatory system?

Answer 30

closed

Question 31

Echinodermata have reproduction via

Answer 31

external fertilization

Question 32

what makes sea cucumbers unique?

Answer 32

they have leathery skin