Week 5

Question 1

mollusca characteristics

Answer 1

coelmates
triploblastics
have a muscular foot
have a mantle
have a shell or ancestrally had a shell

Question 2

mantle

Answer 2

dorsal footing of skin secretes the shell

Question 3

cephalopoda characteristics

Answer 3

strictly marine animals
muscular food adapted into tentacles and arms with suction cups
have a siphon
have a well developed eye
some species are able to change colors using chromatophores in their skin

Question 4

what do cephalopoda used their siphon for

Answer 4

used for jet propulsion and releasing ink from their ink sac

Question 5

can all cephalopoda see color

Answer 5

many cannot see colors

Question 6

what is a chromotophores

Answer 6

pigment cells

Question 7

why do cephalopda change color

Answer 7

to camouflage
scare away predators
communicate

Question 8

what end do cephaloda use when using jet propulsion

Answer 8

their dorsal end first

Question 9

external anatomy of cephalopoda

Answer 9

dorsal end- mantle and fins
ventral end- tentacles, arms, and beak
posterior end- siphon

Question 10

arms of cephalopoda

Answer 10

shorter than tentacles and are used for grabbing food and bringing it to the beak

Question 11

tentacles

Answer 11

longer than arms and used for reproduction

Question 12

beak

Answer 12

center of tentacle sand arms

Question 13

bivalvia characteristics

Answer 13

have 2 shells (valves)
filter feed through siphons
musuclar foot used for digging

Question 14

external bivalve anatomy

Answer 14

striated shells of bivalved are like the rings of trees- indicate age

Question 15

umbo

Answer 15

oldest part of the clam

Question 16

where is the umbo on a clam

Answer 16

dorsal side of clam

Question 17

what side of a clam opens

Answer 17

the ventral side

Question 18

status of freshwater mussels

Answer 18

297 taxa recorded in North America

71% of these are extinct of imperiled

Question 19

threats of freshwater muscles

Answer 19

habitat alteration
change in flow regime
loss of host species
commercial harvest

Question 20

freshwater muscles in kansas

Answer 20

46 species
5 extriparted
7 endangered
4 threatened
12 SINC

Question 21

why should we care about mussesl

Answer 21

ecosystem function
   nutrient cycling
   filtration of water column
   substrate mixing
indicator species
biodiversity
intrinsic value

Question 22

freshwater mussel reproduction

Answer 22

glochidia need to encyst on fish to develop

juveniles the drop to substrate

Question 23

gastropoda characteristics

Answer 23

have a head
muscular foot used for movement
have tentacles
usually detritivores
most are adapted to survive in terrestrial habitats, but are restricted to areas near water sources

Question 24

tentacles of gastropoda

Answer 24

“eye stalks” are tentacles with eyes on end

Question 25

how do gastropoda get food

Answer 25

scrape organic matter off of surfaces with radula

Question 26

radual

Answer 26

tongue like blade in their mouth

Question 27

larval development of gastropods

Answer 27

during the larval stage of development, they go through a process called "torsion"

Question 28

what is torsion

Answer 28

process of flipping the end of the digestive tract (anus) up and around towards the anterior of the organism

Question 29

what is spiraling

Answer 29

process the mantle goes through that causes the spiral shape of the shell

Question 30

is torsion the same a spiraling

Answer 30

no it is not

Question 31

what do slugs have to go through to bring the anus back to where it originally was

Answer 31

detorsion

Question 32

why do slugs have to go through detorsion

Answer 32

they have their anus at the posterior end of their body