Chapter 33

Question 1

invertebrates are animals that lack a ________________

Answer 1

vertebral column or backbone

Question 2

____________ of all animals are invertebrates

Answer 2

95%

Question 3

___________ are animals that do possess a vertebral column

Answer 3

vertebrates

Question 4

_______________ of animals species are vertebrates

Answer 4

only 5%

Question 5

__________________ is the only animal group that contains vertebrates

Answer 5

chordate

Question 6

• sponges
• aquatic
• assymetrical
• no tissue tissues
• aggregates of special cells

Answer 6

porifera

Question 7

porifera are _________ as adults yet _______ as larvae

Answer 7

sessile, free-swimming

Question 8

porifera reproduce

Answer 8

asexually by fragmentation

Question 9

___________________ eggs and sperm are released into the water and fertilization occurs externally

Answer 9

asexual reproduction by fragmentation

Question 10

porifera are _________________

Answer 10

filter feeders

Question 11

• all are aquatic-radially symmetrical
• diploplastic
• sexual reproduction occurred externally
• a central digestive compartment
• tentacles surround mouth and anus

Answer 11

cnidaria

Question 12

a central digestive compartment. A single opening to the gastrovascular cavity serves as both mouth and anus

Answer 12

gastrovascular cavity

Question 13

____________ surround mouth/anus

Answer 13

tentacles

Question 14

tentacles are lined with stinging cells called _______________ that capture food

Answer 14

cynidocytes

Question 15

cnidarians exists in one of two shapes

Answer 15

• medusae

- polyps

Question 16

___________ are free swimming cnidaria like see jellies

Answer 16

medusa

Question 17

_____________ are sessile cnidaria like sea anemones hydras or corals

Answer 17

polyps

Question 18

flatworms

Answer 18

platyhelminthes

Question 19

platyhelmithes are _________________

Answer 19

aquatic, moist terrestrial, or parasitic within other organisms

Question 20

platehelminthes are _________________ symmetrical

Answer 20

bilaterally

this gives a definite anterior and posterior end

Question 21

3 more qualities of a platyhelminthes

Answer 21

• triploblastic
• lophotrochozoan protostomes
• accelomate
• possess a gastrovascular cavity
• planarians

Question 22

examples of parasitic flatworms/ platyhelminthes

Answer 22

-flukes and tapeworms

Question 23

___________________ is a free living platyhelminthes in marine, freshwater or moist terrestrial habitats

Answer 23

planarians

Question 24

rotifera are _________________

Answer 24

aquatic

Question 25

rotifera are all ________________________ and have a ________________ colem

Answer 25

microscopic | psedocolemeate

Question 26

rodifers possess a _______________

Answer 26

a complete digestive tract for food processing with an opening at each end - a mouth at the anterior end and an anus at the posterior - a one way tub

Question 27

rotifers produce _________________ by way of ____________________

Answer 27

asexually | parthenogenesis

Question 28

in parthenogenesis females produce offspring from ____________________

Answer 28

unfertilization

Question 29

_________________ the second largest animal group

Answer 29

mollusca

Question 30

mollusks are _________________

Answer 30

marine, some freshwater or moist terrestrial

Question 31

mollusca are ___________

Answer 31

eucolemate

Question 32

two main regions possessed by a mollusca

Answer 32

- muscular foot | - soft mental

Question 33

along the ventral or bottom side of a mollusca used for movement

Answer 33

muscular foot

Question 34

along the dorsal top side. Surrounds all of the body organs. It secretes a shell to the outside for protection

Answer 34

soft mental

Question 35

shelled animals

Answer 35

molluscs

Question 36

a mollusca that possess an eight plates shell. Feed using scraping organs called radula

Answer 36

chitons

Question 37

a mollusca that include snails and slugs. Slugs have lost their shells. feed using radula.

Answer 37

gastropods

Question 38

a sea slug

Answer 38

nudibranch

Question 39

a mollusca that includes clams, oysters, and scallops. They are filter feeders. Food is drawn in by water. Their name comes from having two shells hinged together

Answer 39

bivalved

Question 40

a mollusca that includes nautiluses, squids and octopi. Feed using their arms tenticles and grasping beak

Answer 40

cephalopods

Question 41

about cephalopod shells octopuses- squid-

Answer 41

no shell | internalized shell

Question 42

________________ are segmented worms. There are 3 different types of annelids, each found in a different type of habitat

Answer 42

annelids

Question 43

_____________ marine annelid

Answer 43

polychaete

Question 44

________________ freshwater annelid

Answer 44

leeches

Question 45

_____________________ moist terrestrial annelid

Answer 45

earthworms

Question 46

annelids exhibit ________________

Answer 46

segmentation also known as metamerism - the external body is visibly segmented - the internal body is also partitioned

Question 47

in a segmented worm each ___________________ is repeated in each segment

Answer 47

organ system

Question 48

______________ are roundworms. Aquatic, terrestrial, parasitic found everywhere. surrounded by a nonliving culture. pseudocoelmate

Answer 48

nematoda

Question 49

nematodes undergo _________________________ in order to grow

Answer 49

ecdysis (molting)

Question 50

________________ a model organism is biology. a nematod

Answer 50

caenorhabditis

Question 51

____________________ a nematod. a parasite that blocks lymph vessels and cause severe swelling called elephantiasis

Answer 51

wuchereria bancrofti

Question 52

_______________ are the largest group. found in all habitats. Segmented but their regions are fused into functional regions of the body called tagmata

Answer 52

arthropoda

Question 53

Segmented but their regions are fused into functional regions of the body called __________________

Answer 53

tagmata

Question 54

two tagmatas that many arthropods possess

Answer 54

cephalothorax and abdomen

Question 55

one arthropods possess 3 tagmata

Answer 55

-head, thorax, abdomen

Question 56

____________possessed by arthropods used for walking, swimming, flying, eating, mating, fighting, sensing

Answer 56

jointed appendages

Question 57

an external nonliving cuticle of a arthropod made of

Answer 57

chitin

Question 58

some insects undergo complete ____________________

Answer 58

metamorphosis, a total reangement of body plan between larval and adult stage

Question 59

____________ arthropods: arachnids (spiders, scorpions, ricks, and mites) and horseshoe crabs

Answer 59

chelicerates

Question 60

________________ arthropods: that contain crabs, lobsters, barnacles, and isopods

Answer 60

crustaceans

Question 61

__________________ arthropods: centipedes, millipedes

Answer 61

myriapods

Question 62

______________________ largest group of arthropods

Answer 62

insects

Question 63

what are insects successful

Answer 63

- they are capable of flight | - only arthropods undergo complete metamorphosis

Question 64

metamorphosis reduces _________

Answer 64

competition between larvae and adult.

Question 65

entirely marine, dueterostome development.

Answer 65

echinoderms

Question 66

echinoderms begin as larvae that are ____________________ symmetrical and are ________________ as adults

Answer 66

bilateral | radial-pentaradial

Question 67

echinoderms possess an _____________ that projects outward. They appear as bumps in the skin of sea stars and cucumbers

Answer 67

endoskeleton

Question 68

echinoderms possess a __________________ of internal canals. Used for locomotion. The canals end in tube feet that sweet and extend for movement

Answer 68

water vascular system