Week 2

Question 1

Phylum Porifera Characteritics

Answer 1

1- Cellular level of organization
2- filter feeding through pores and canals
3- skeleton made of spicules and spongin
4- have specialized cells lining their canals called choanocytes for feeding and moving water
5- some have mutualistic (both benefiting) symbiotic relationship with algae

Question 2

do phylum Porifera cells fit the definition of tissue?

Answer 2

no though they are multicellular

Question 3

Pores

Answer 3

ostia and Osculum

Question 4

Canals

Answer 4

Spongocoel and Radial canals

Question 5

what is the Phylum Porifera skeleton made of

Answer 5

spicules and spongin

Question 6

choanocytes

Answer 6

specialized cells that line Porifera canals for feeding and moving water

Question 7

how do sponges get food?

Answer 7

from the photosynthesizing algae

Question 8

what does algae get from sponges

Answer 8

protection

Question 9

example of mutualistic relation ship of Porifera

Answer 9

sponges and algae

Question 10

path of water through sponges

Answer 10

ostia
radial canal
spongocoel
osculum

Question 11

choanocytes

Answer 11

single, flagellated cell, flagella move water, and these filter out nutrients from the water

Question 12

how can sponges be catergorized

Answer 12

based on organization of their canal system

Question 13

types of sponges

Answer 13

asconoid
syconoid
leuconoid

Question 14

asconoid sponges

Answer 14

don’t have radial canals

ostia, spongocoel, osculum

Question 15

syconoid sponges

Answer 15

have radial canals that connect to the spongocoel

Question 16

leuconoid sponges

Answer 16

have a network of canals and a very small spongocoel

Question 17

Phylum Cnidaria Characteristics

Answer 17

1- radial symmetry
2- tissue level of organization
3- diploblastic
4- have a gastrovascular activity
5- have cnidocytes on their tentacle that contain nematocysts
6- usually have 2 types of body form

Question 18

diploblastic

Answer 18

2 tissue layers
epidermis
gastroderm

Question 19

cnidocytes

Answer 19

cells that have stinging cells

Question 20

nematocysts

Answer 20

stinging organelles on cnidocytes

Question 21

2 types of body forms of Phylum Cnidaria

Answer 21

polyp

medusa

Question 22

polyp

Answer 22

sessile form

Question 23

medusa

Answer 23

free swimming

Question 24

Cnidaria Anatomy

Answer 24

epdiermis- outer layer of tissue
mesoglea- “jelly” layer between the tissue layers, used for structure
gastrodermis- the inner digestive layer of tissue

Question 25

Class Hydrozoa Characteristics

Answer 25

1- small 2- usually colonial 3- have cnidocytes

Question 26

Class Scyphozoa | Aurelia

Answer 26

``` commonly known as "moon jelly" common along North American coasts size range of 2 to 40 cm body composition mainly water carnivorous organisms that feed on fish and other marine vertebrates ```

Question 27

Class Anthozoa

Answer 27

anemones and corals

Question 28

Metridium

Answer 28

sea Anemone

Question 29

Sea Anemone

Answer 29

strictly marine animals | usually found on rocks

Question 30

up to what depths can you find Class Anthozoa

Answer 30

up to 75 meters

Question 31

characteristics of Class Anthozoa

Answer 31

solitary, sessile animals but can be found in colonies

Question 32

what form are memers of the Class Anthozoa

Answer 32

polyp form, medusae is absent

Question 33

what does Astrangia resmeble?

Answer 33

small anemones but are usually colonial

Question 34

What can Astrangia colonies consist of?

Answer 34

millons of individuals, forming coral reefs

Question 35

What is the only shallow water northern coral, local to Florida?

Answer 35

Astrangia

Question 36

what does Astrangia feed on?

Answer 36

principally on Zooplankton,

Question 37

how does Astrangia feed on Zooplankton?

Answer 37

they are paralyzed by nematocysts on its tentacles and carried to its mouth via its cilia

Question 38

ostia

Answer 38

a series of tiny pores all over the body of a sponge that let water into the sponge

Question 39

osculum

Answer 39

a large aperture in a sponge through which water is expelled

Question 40

freshwater sponges

Answer 40

have digitiform growth forms are not very big latch onto rocks and sticks found in lakes, ponds, rivers, and streams

Question 41

digitiform

Answer 41

finger like