Lab 2 Vocab

Question 1

Polyphyletic

Answer 1

more than one common ancestor

Question 2

Bilaterally symmetrical

Answer 2

Two equal sides (like us)

Question 3

triploblastic

Answer 3

true mesoderm derived tissue and endoderm and ectoderm

Question 4

Acoelomate

Answer 4

no coelom

Question 5

gastrovascular cavity

Answer 5

digestion of food and the transport of nutrients throughout the body. only one opening to environment

Question 6

cephalization

Answer 6

the concentration of sense organs, nervous control (head)

Question 7

Phylum platyhelminthes

Answer 7

flatworms. acoelomate, cephalization, gastrovascular cavity, flame cell protonephridia.

Question 8

Phylum platyhelminthes 3 classes

Answer 8

class turbellaria (some free living), trematoda and cestoidea

Question 9

Phylum nematoda 1 genera

Answer 9

Ascaris

Question 10

Phylum Annelida 3 classes

Answer 10

Class clitellatea, subclasses Oligochaeta, hirudinea and class polychaeta`

Question 11

Class turbellaria

Answer 11

Free-living, ocelli and pharynx

Question 12

Ocelli

Answer 12

simple eye/eyespot for light avoidance

Question 13

pharynx

Answer 13

passageway between external opening and rest of resp/dig system

Question 14

Class trematoda

Answer 14

“flukes” All parasitic. Multiple hosts, several developmental forms. Many features are adaptations to parasitic lifestyle

Question 15

Class cestoidea

Answer 15

tapeworms. Parasites, complex life cycles. Complex head (scolex), flattened body consisting of segment-like proglottids containing gonads.

Question 16

Proglottids maturing

Answer 16

shed from end of worm with lots of eggs

Question 17

Phylum nematoda

Answer 17

Roundworms. Complete digestive tracts. They are part of ecdysozoa, the molt. pseudocoelomate

Question 18

Complete digestive tract

Answer 18

with an anus!

Question 19

Ecdysozoa

Answer 19

they molt

Question 20

pesudocoelom

Answer 20

fluid filled and functions like hydrostatic skeleton, not completely lined with mesoderm

Question 21

Ascaris

Answer 21

roundworm in human gut

Question 22

Phylum annelida

Answer 22

eucoelomate, hydrostatic skeleton, free living, complete digestive systems, metamerism, setae, closed circulatory system

Question 23

eucoelomate

Answer 23

body cavity derived entirely from mesoderm

Question 24

setae

Answer 24

chitinous bristles that aid in attachment and prevent backsliding during locomotion

Question 25

peristaltic locomotion

Answer 25

sequential elongation and contraction of body segments that relies on hystostatic skeleton

Question 26

metamerism

Answer 26

true segmentation with every organ segmentally arranged

Question 27

subclass oligochaeta

Answer 27

setae in small bundles, earthworms, true segmentation

Question 28

Class clitellata 2 subclasses

Answer 28

oligochaeta, hirudinea

Question 29

subclass hirudinea

Answer 29

leeches, posterior and anterior suckers, no septa

Question 30

Class polychaeta

Answer 30

marine, burrow in mud/tubes in calcium carbonate, predators or filter feeders (flower like), modified setae bearing appendages (parapodia)

Question 31

parapodia

Answer 31

modified setae-bearing appendages adapted for specialized functions