Science: Mollusks, Worms, Arthropods, Enchinoderms

Question 1

Mollusks:

Answer 1

soft-bodied invertebrates with bilateral symmetry and usually one or two shells wit organs in a fluid-filled cavity

Question 2

Mantle:

Answer 2

thin tissue layer that covers body organs

Question 3

A mantle cavity has gills which:

Answer 3

exchange Carbon Dioxide and Oxygen

Question 4

underside:

Answer 4

muscular foot for movement

Question 5

gastropods have how many shells?

Answer 5

usually one

Question 6

Mollusks are classified based on…

Answer 6

shell presence, shell type, and foot type

Question 7

cephalopods: (squid, octopi, cuttlefish, nautiluses)

Answer 7

complex mollusks with a brain (cephla) and foot (opod)

Question 8

Bivalves have hinged, __ ____ shell and include…

Answer 8

two part shells / clams, oysters, scallops

Question 9

snails, garden slugs, and conchs are in what category?

Answer 9

gastropods

Question 10

radula:

Answer 10

tongue like organ with rows of teeth to get food

Question 11

what do cephalopods use to catch prey?

Answer 11

tentacles

Question 12

jet propulsion:

Answer 12

squeezing a liquid/gas to move faster

Question 13

mollusks provide for _____ like pearls

Answer 13

shells

Question 14

Annelids:

Answer 14

segmented worms with setae (bristlelike structures) to hold on to soil and move; mouth and anus, and bilateral symmetry

Question 15

Earthworms move with what?

Answer 15

setae and 2 sets of muscles

Question 16

Gizzard:

Answer 16

what grinds soil and organic matter

Question 17

Earthworms use ______ to grind and ingest soil and put it into the crop for storage

Answer 17

gizzards

Question 18

What circulatory system do Earthworms have?

Answer 18

closed

Question 19

Earthworms are herm_____

Answer 19

hermaphrodites

Question 20

Marine Worms:

Answer 20

or polychaetes, have segments with setae, are sessile, and ones like the bristleworm are sessile

Question 21

Leeches:

Answer 21

segmented worms w/o setae that feed on blood

Question 22

Leeches are used in ______

Answer 22

medicine

Question 23

Leeches release chemicals that are being studied as ___________

Answer 23

treatments

Question 24

segmented worms aerate the _____ and produce good chimicals

Answer 24

soil

Question 25

Segmented worms may have evolved in…

Answer 25

the sea

Question 26

Appendages:

Answer 26

jointed parts of arthropods

Question 27

exoskeleton:

Answer 27

a body cavity that digests arthropods

Question 28

Some arthropods have many or ____ segments

Answer 28

fused

Question 29

molting:

Answer 29

replacing of an exoskeleton

Question 30

What body regions do insects have?

Answer 30

thorax, antenae, and abdomen

Question 31

spiracles:

Answer 31

openings in the abdomen in which waste gas leaves

Question 32

eggs, nymphs, and adults are what type of metamorphisis?

Answer 32

incomplete

Question 33

Arachnids:

Answer 33

spiders and ticks that have a cephalothorax and abdomen

Question 34

scorpions have poison stingers at the end of their…

Answer 34

abdomen

Question 35

Spiders inject prey with _______ to digest

Answer 35

enymes

Question 36

mites and ticks are ________ that cause disease

Answer 36

parasites

Question 37

Crustations:

Answer 37

crabs, shrimp, and barnacles with 1/2 pairs of antennae and mandibles to crush food

Question 38

Arthropods can be _______ that carry diseases, and also ____

Answer 38

pests, food

Question 39

_______ can kill insects but cause environmental problems

Answer 39

insecticides

Question 40

arthropods may have evolved from…

Answer 40

segmented worms

Question 41

Enchinoderms:

Answer 41

have an endoskeleton with radial symmetry, with mouth and intestines, but no head/brain

Question 42

water-vascular system: (thin blood)

Answer 42

allows enchinoderms to move and exchange CO2 with H20 food and release waste

Question 43

Sea stars:

Answer 43

have 5+ arms and reproduce sexually and can regenerate

Question 44

Battle Stars:

Answer 44

allow a predator to break off an arm, allowing it to escape and regenerate

Question 45

sea urchins and sand dollars:

Answer 45

disk/glove shaped animals with spines

Question 46

sea cucumbers:

Answer 46

soft bodied with a leathery covering

Question 47

enchinoderms help ________

Answer 47

recycle