Week 7 Flashcards Preview

BI488- Invertebrate Conservation > Week 7 > Flashcards

Flashcards in Week 7 Deck (50)
Loading flashcards...
1

Coral reefs are home to __ of all ocean species

1/4

2

Coral reefs cover less than ___% of the oceans bottom

0.1

3

coral reefs are made up of coral ______

skeletons

4

what are corals

colonies of small animals embedded in calcium carbonate challs

5

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

polyps

6

Polyps contain a microscopic algae known as ______

zooxanthellae

7

what is the relationship between zooxanthellae and corals

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

8

what is a blind stomach

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

9

what is a fringing reef

grows seaward directly from the shore of a volcanic island

10

what is a barrier reef

fringing reef that is separated from the land by water

11

what is an atoll

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

12

what are the specialized cells in cidaria

cnidocytes

13

what is the stinging organelle in cnidocytes

nemadocyst

14

T or F: most cnidarians are sessile

T

15

Phylum cnidaria have what symmetry?

radial or biradial

16

how many germ layers do cnidarians have

2

17

T or F: cnidarians are triploblastic

F: diploblastic

18

what are the two body types of cnidarians

free swimming medusae and sessile polyps

19

what are the four classes of cnidarians

Hydrozoa, Scyphozoa,cubozoa and anthozoa

20

what is a difference between anthozoa and other cnidaria

hexa or octaradial

21

how to polyps reproduct

asexually by budding, fission or pedal laceration

22

how do polyps attach to substratum

pedal disc

23

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

T

24

gastrozooid polyps are for:

feeding

25

dactylzooid polyps are for

defense

26

how to hydra move

by gliding on their pedal disc aided by mucous secretions

27

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

T

28

Anemonies and corals only produce ______

polyps

29

what jellyfish have a polyp stage

true jellyfish (scyphozoa)

30

Medusae reproduce _______-

sexually