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BI488- Invertebrate Conservation > Week 10 > Flashcards

Flashcards in Week 10 Deck (28)
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1

once you pass 30 degrees north or south, why are there no coral reefs?

calcification levels decrease

2

amounts of co2 in the water affect the ____ and ___ ______

pH, aragonite saturation

3

__ percent of incoming energy is radiated back into space, rest is absorbed

30

4

name some greenhouse gasses

co2, methane, nitrous oxide

5

what three things do the amount of solar radiation depend on

eccentricity, axial tilt and precession

6

what is eccentricity

amount of orbit differs from a perfect circle

7

what is precession

orientation of the rotational axis of a rotating body

8

how does pH get lowered by co2 absorption in the ocean

co2 reacts with water to form carbonic acid, the converted into bicarbonate, releasing H+ which therefore lower pH

9

lower pH means less ___ _____ in the water

free hydrogen

10

free hydrogen in the water convets _____ into _____

carbonate into bicarbonate

11

why do we need carbonate in the water?

so organisms like corals can create their carbonae skeletons

12

coral bleaching is highly likely if sea temperature reaches ___C over the long term summer max

1

13

what are some difficulties with corals adapting to changes

long generation times therefore slow rates of evolution, may be at the cost of genetic diversity

14

exceeding ___ppm will result in coral beaching on an annual basis

450

15

what are some primitive bilatera characteristics

bilateral symmetry, anterior/posterior axis, coelom, metamerism, cephalization

16

what is enterocoely

outpocketing of the mesoderm

17

what are the five derived chrodate characteristics

Notochord, dorsal nerve cord, pharangeal pouches/slits, postanal tail and endostyle/thyroid gland

18

in the dorsal nerve cord, is the anterior or posterior end enlarged?

anterior

19

in more complex organisms, the dorsal nerve cord runs through _____ _____

neural arches

20

what are some characteristics of the notochord

first part of endoskeleton, stiffens body axis, permits movement without shortening

21

what is the difference ebtween pharyngeal pouches and slits

water can flow through slits, pouches are pockets on the inside that do not go out

22

T or F: sometiems pharyngeal slits evolve into gills

T

23

what is the postanal tail for

mobility and balance

24

what is the endostyle

like the thyroid in less complex organsims, secres mucous

25

what are sephalochordata

marine burrowing, simple, pull in water through the mouth and through pharangeal slits

26

what is the subphylum urochordata

sessile marine adults, sea squirts!

27

T or F: sea squirts are the only animal that is made of cellulose

T

28

what does craniata mean

skull encovering the brain, also has cartilage or bony endoskeleton