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Invertebrate Zoology > Exam 2 > Flashcards

Exam 2 Flashcards

1
Q

Advantage to having a closed circulatory system

A

blood can reach further distances

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2
Q

Aplacophora

A

worm-like body (vermiform)

no true shell = calcareous spicules on epidermis

radula pierce the prey

hermaphrodites or gonochorisitc

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3
Q

Bivalia

A

CLAMS

2 shells connected by a hinge ligament

filter-feed

no radula

(anterior dorsal) umbo

2 siphons (incurrent-food/water and excurrent-waste)

hermaphrodite or gonochoristic

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4
Q

Cephalopoda

A

closed circulatory system

head-foot

beak + radula

modified foot to forms arms and siphon

2 branchial hearts

1 systemic heart

heart at end of each gill to increase blood pressure

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5
Q

Cephalopoda phylogeny

A

closed circulatory system

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6
Q

Cephalopods unique

A

have cells to change colors
change texture of skin

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7
Q

Phylum of Annelida

A

POH

Polychaeta

Clitellata

Oligochaeta

Hirudinea

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8
Q

crystalline style

A

how bilvaliva feeds since they have radula

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9
Q

Gastropoda

A

SLUGS/SNAILS

stomach foot

have operculum to prevent drying out

adults have torsion

use radula for feeding

hermaophrodites or gonochorisitic

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10
Q

Gastropods are mostly

hermopadite or gonochoristic

A

hermopadite

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11
Q

hemocoel

A

blood cavity that surrounds the heart

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12
Q

Most mollusc are

hermaphrodite or gonochoristic

A

gonochoristic

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13
Q

How bivalves use their gills for

A

ggg

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14
Q

Mollusca defining characteristics

A

radula
muscular foot
mantle

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15
Q

Mollusca gills are

A

bipectinate

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16
Q

Monoplacophora

A

LIMPETS

single cap-like shell

3- 6 pairs of gills (ctnedia)

6-7 pairs of kidneys (nephridia)

scrapes up food on ocean bottom

gonochoristic

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17
Q

Open circulatory system relies on

A

countercurrent exchange

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18
Q

Order of Mollusca

A

PAM Gets Bold Starbucks Coffee

Polyplacophora—–Aplacophora—–Monoplacophora

Gastropoda—- Bivalvia —-Scaphopoda—- Cephalopoda

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19
Q

Polyplacophora

A

CHITONS

8 plates + girdle (spicules for predation)

bipectinate gills (ctnedia)

incurrent (water in) / excurrent (waste)

counter current gas exchange

radula scrapes food

aesthetes for light receptors, chemoreceptors or mechanoreceptors

gonochorisitic

20
Q

Protostomes
Eucoelomates

A

Mollusca

21
Q

purpose of countercurrent exchange

A

saturate the blood with oxygen

22
Q

radula

A

rasping organ and can have iron-oxide
supported by the odontophore

23
Q

Scaphopoda

A

TUSK SHELL

tusk shaped conical shell open at both ends

(anterior) thread-like adhesive feeding tentacles (captacula) into the sediment

(posterior) exposed above sediment

gonochoristic

produces trochophore larvae

24
Q

Shell in mollusca made of

A

organic and inorganic material

25
Q

Gastropods carry their shell, if they have one, tipped to the

A

left (sinsitial)

26
Q

siphuncle

A

regulates amount of gas in the chamber

27
Q

trochophore larva

A

3 bands of cilia = produces the different parts of the animals

28
Q

veliger

A

second larval stage
starts the formation of the shell
common in the bivalves

29
Q

What member of the Cephalopods have a external shell

A

Nautilus

30
Q

Where is the coelomic cavity in the mollusca

A

hemocoel

31
Q

prostomium

A

before the mouth of the annelida

32
Q

Nephridia functions in annelids

A

discharging gametes

discharging urine

regulate water content of coelomic fluid

33
Q

Annelida with no segmentation

A

leeches

sibs

ech

sip

34
Q

annelida with no chaetae

A

leeches

sip

35
Q

annelida with no parapodia

A

oligochaetes

leeches

36
Q

Errantia

A

well developed parapodia, most carnivores

37
Q

Sedentaria

A

reduced or highly modified parapodia, often tube dwellers

38
Q

oligochaetes are

gonochoristic or hermaphrodites

A

hermaphrodites

39
Q

parapodia purpose in annelida

A

increases surface area for gas exchange

40
Q

siboglinids live in

A

chitinous tubes

41
Q

Why is it believed worms evolved from ancestors with protonephridia when most of them have metanephridia?

A

Most species have protonephridia in the larval stage even if while metanephridia is seen in adults.

42
Q

acicula

A

chitinous support rods that stiffens the parapodia

43
Q

annelida without digestive tract

A

sibs

44
Q

annelids without probscois

A
45
Q

Epitoke

A

mostly sexual reproduction with aesxual reproduction in some

developed to help escape predation in species

Polychaetes

Invertebrate Zoology (4 decks)

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