Porifera & Cnidarian

Question 1

The most simple marine animal.

Answer 1

Sponge

Question 2

Not a characteristic of a Cnidarian.

Answer 2

Having a complex nervous system

Question 3

Which Cnidarian class form colonies with specialized polyps?

Answer 3

Hydrozoa

Question 4

Which Cnidarian class has organisms in the polyp stage only?

Answer 4

Anthozoa

Question 5

Which is not a requirement for Coral Reef growth?

Answer 5

Pollution

Question 6

Jellyfish have a limited swimming ability, so they are known as…

Answer 6

Nektonic

Question 7

Which type of coral reef is the most common?

Answer 7

Fringing

Question 8

Which type of coral reef forms due to a volcano sinking?

Answer 8

Atolls

Question 9

Porifera actually means _____ which makes sense because sponges have many that are called _____

Answer 9

Pore-bearing, Ostia

Question 10

The cells that line the canals of the sponge are called…

Answer 10

Choanocytes or Collar Cells

Question 11

The 2 components that can make up a sponge’s skeleton are…

Answer 11

Spongin and Spicules

Question 12

The scientific name for the stinging cells on jellyfish is…

Answer 12

Cnidocytes

Question 13

Coral secrete their skeletons made of…

Answer 13

Calcium Carbonate

Question 14

Example of an Anthozoa.

Answer 14

Coral

Question 15

Example of Ctenophora.

Answer 15

Comb Jellies

Question 16

Example of Hydrozoa.

Answer 16

Portuguese Man-O-War

Question 17

Example of Hexaxtinellida.

Answer 17

Glass Sponge

Question 18

Example of Scyohozoa.

Answer 18

True Jellies

Question 19

Example of Calcarea.

Answer 19

Spicules made of CaCO3

Question 20

Example of Demospongiae.

Answer 20

Bath Sponge

Question 21

Ascon Body Plan

Answer 21

U

Question 22

Leucon Body Plan

Answer 22

O

Question 23

Sycon Body Plan

Answer 23

#

Question 24

What are the 2 purposes that the collar cells serve?

Answer 24

The movement and direction of water-flow, and the storage and intake of nutrients.

Question 25

Explain in detail the reproduction process of a sponge. (draw photo)

Question 26

What type of symmetry is a sea anemone? What does that mean?

Answer 26

Radial Symmetry; When or if the body is divided along and main axis, there is no notable front or back because it is perfectly symmetrical.

Question 27

The sea anemone is both benthic and sessile. What does each mean as a characteristic of the sea anemone?

Answer 27

It's benthic because it lives on the ocean floor, but sessile because it will forever be attached to the ocean floor, meaning it does not move.

Question 28

Jellyfish have stinging cells to help them catch prey. What are the stinging cells called? What are the stingers on the cell called? What do these cells do to help them catch their prey?

Answer 28

Cnidocytes, Nematocysts. When touched, the cells will shoot out into the "prey" and capturing it in its immobile form.

Question 29

Explain zooxanthellae symbiosis.

Answer 29

Algea called zooxanthellae live within coral tissues for protection, whilst also providing nutrients to the corals through photosynthesis.

Question 30

Based on the information you provided about the symbiotic relationship, describe any additional information this tells you about coral.

Answer 30

Corals must live in shallow waters in order to gain sunlight.

Question 31

What would be some dangers to the coral reef?

Answer 31

Global Warming, pollution, too high or low temperature, hurricanes, runoff, bleaching.