Week 7

Question 1

Coral reefs are home to __ of all ocean species

Answer 1

1/4

Question 2

Coral reefs cover less than ___% of the oceans bottom

Answer 2

0.1

Question 3

coral reefs are made up of coral ______

Answer 3

skeletons

Question 4

what are corals

Answer 4

colonies of small animals embedded in calcium carbonate challs

Question 5

The head of a coral is made up of individual animals called _____

Answer 5

polyps

Question 6

Polyps contain a microscopic algae known as ______

Answer 6

zooxanthellae

Question 7

what is the relationship between zooxanthellae and corals

Answer 7

mutualistic, zoo produce glucose and amino acids, corals produce CO2 and provide shelter

Question 8

what is a blind stomach

Answer 8

waste goes in the same way it comes out; incomplete digestion

Question 9

what is a fringing reef

Answer 9

grows seaward directly from the shore of a volcanic island

Question 10

what is a barrier reef

Answer 10

fringing reef that is separated from the land by water

Question 11

what is an atoll

Answer 11

fringing reef that continues to grow upward from a volcanic island that sinks below sea level

Question 12

what are the specialized cells in cidaria

Answer 12

cnidocytes

Question 13

what is the stinging organelle in cnidocytes

Answer 13

nemadocyst

Question 14

T or F: most cnidarians are sessile

Answer 14

T

Question 15

Phylum cnidaria have what symmetry?

Answer 15

radial or biradial

Question 16

how many germ layers do cnidarians have

Answer 16

2

Question 17

T or F: cnidarians are triploblastic

Answer 17

F: diploblastic

Question 18

what are the two body types of cnidarians

Answer 18

free swimming medusae and sessile polyps

Question 19

what are the four classes of cnidarians

Answer 19

Hydrozoa, Scyphozoa,cubozoa and anthozoa

Question 20

what is a difference between anthozoa and other cnidaria

Answer 20

hexa or octaradial

Question 21

how to polyps reproduct

Answer 21

asexually by budding, fission or pedal laceration

Question 22

how do polyps attach to substratum

Answer 22

pedal disc

Question 23

T or F: some polyps may take on different roles in the same colony

Answer 23

T

Question 24

gastrozooid polyps are for:

Answer 24

feeding

Question 25

dactylzooid polyps are for

Answer 25

defense

Question 26

how to hydra move

Answer 26

by gliding on their pedal disc aided by mucous secretions

Question 27

T or F: some cnidarians do not have both the polyp and medusae life cycle

Answer 27

T

Question 28

Anemonies and corals only produce ______

Answer 28

polyps

Question 29

what jellyfish have a polyp stage

Answer 29

true jellyfish (scyphozoa)

Question 30

Medusae reproduce _______-

Answer 30

sexually

Question 31

T or F: medusae are dioecious

Answer 31

T

Question 32

what is an operculum

Answer 32

lid that protects the nematocyst

Question 33

what is the mechanism of nematocyst discharge

Answer 33

operculum opens and launches fimalent, barbs inject poison into prey

Question 34

T or F: hydra have both polyp and medusa forms

Answer 34

T

Question 35

T or F: clas Staurozoa do not have a medusa stage

Answer 35

T

Question 36

T or F: Staurozoa reproduce asexually

Answer 36

F

Question 37

In class cubozoa, what form is dominant?

Answer 37

medusa :-)

Question 38

what is the velarium

Answer 38

extra extension at the bottom of the bell, helps for streamlining or control expelling water

Question 39

T or F: class anthozoa lack a polyp stage

Answer 39

F: lack a medusa stage

Question 40

what are some examples of class anthozoa

Answer 40

anemonies, stony and soft corals

Question 41

what is the subclass hexacoralia

Answer 41

stony corals

Question 42

what is the subclass octocoralia

Answer 42

soft corals

Question 43

stony corals have _-fold symmetry whereas soft corals have __-fold symmetry

Answer 43

6, 8

Question 44

what are ctenophores

Answer 44

in phylum ctenophora; eight rows of comb like plates of cilia used of locomotion

Question 45

what symmetry do phylum ctenophores have

Answer 45

biradial!

Question 46

phylum ctenophores lack ______ which is why they are not classified as cnidarai

Answer 46

nematocyst

Question 47

phylum ctenophores exhibit ________

Answer 47

bioilluminescence

Question 48

the coral triangle contains ____ percent of worlds coral speces

Answer 48

76%

Question 49

what is reticulate evolution

Answer 49

describes the origination of a lineage through the partial merging of two ancestor lineages

Question 50

what is an important concern on the coral triange

Answer 50

ocean acidification, becasue pH affects calcification