Exam 3 Ch 13

Question 1

What three Phyla are included in Clade Panarthropoda?

Answer 1

Arthropoda, Onychophora, and Tardigrada

Question 2

Clade Ecdysozoa includes what four phyla?

Answer 2

Nematoda, Onychophora, Tardigrada, Arthropoda.

Question 3

What is the only phyla we studied that is a protostome but uses enterocoely?

Answer 3

Tardigrada

Question 4

Characteristics of Clade Panarthropoda?

Answer 4

segmented w paired appendages
hemocoel and open circulation
ecdysis
eucoelomates

Question 5

Common name of Phylum Onychophora?

Answer 5

Velvet worms

Question 6

Characteristics of Phylum Onychophora?

Answer 6

Fusion and modification of segments
Dioecious
Nocturnal
Lobopods: walking appendages
slime glands (for capturing prey)
restricted to humid, tropical/temperate regions due to thin, permeable exoskeleton
open spiracles(breathing, cannot close)

Question 7

Characteristics of sense organs in Phylum Onychophora?

Answer 7

well developed eyes
taste spines
tactile papillae (sensory)
hygroscopic (tests humidity)

Question 8

What is the common name of Phylum Tardigrada?

Answer 8

waterbear/moss piglet

Question 9

characteristics of Phylum Tardigrada?

Answer 9

900 species
less than one mm long
dioecious
mostly terrestrial but require moisture
crawl awkwardly

Question 10

Form and function of Tardigrades? (1-3)

Answer 10

1 body covered by non-chitinous cuticle

2. 4 pairs, short, stubby unjointed legs
3. no cir/resp (diffusion across body)

Question 11

Form and Function of Tardigrades? (4-7)

Answer 11

4. only longitudinal muscles
5. hydrostatic skeleton
6. relatively large brain
7. eyes and ocelli present

Question 12

Which phylum undergoes cryptobiosis?

Answer 12

Tardigrada

Question 13

Characteristics of Phylum Arthropoda’s Tracheal system?

Answer 13

1. transports oxygen directly to cells and tissues to allow high metabolic rates
2. aquatic members have gills (no spiracles)
3. oxygen enters via spiracles for terrestrials which can open and close (unlike velvet worms)

Question 14

Characteristics of Phylum Arthropoda’s sensory organs?

Answer 14

1. eyes are simple light sensitive ocelli to compound eyes
2. mechano- and chemoreceptive hairs
3. hearing, balancing, and chemical reception

Question 15

Characteristics of Phylum Arthropoda’s exoskeleton?

Answer 15

protects
hardening accomplished by sclerotization and salt deposition
reduces dessication
provides structural support
enhances mobility
contains chitin
molts controlled by ecdysone

Question 16

Characteristics of Phylum Arthropoda’s jointed appendages?

Answer 16

fexibility between hand segments

appendages characterized by number of branches (uniramous or biramous)

Question 17

Characteristics of Phylum Arthropoda’s segmentation?

Answer 17

primitive pattern: linear series of similar segments with jointed appendages
Tagmata: fusion of segments into specialized groups, for example, the thorax.

Question 18

What are crustaceous larva called?

Answer 18

Naupilus Larva

Question 19

what are the tagmata of crustaceans called?

Answer 19

Cephalothorax and abdomen

Question 20

What are the tagmata of Arachnids called?

Answer 20

Prosoma and Opisthoma

Question 21

What are the tagmata of Hexapoda called?

Answer 21

head, thorax, abdomen

Question 22

What are the tagmata of Myriapoda called?

Answer 22

head and trunk