Quiz #2

Question 1

Secondary Cavity

Answer 1

Internal cavity surrounding the gut that provides a “tube inside a tube” arrangement to the body

Question 2

A-Coelomate

Answer 2

Organisms with no secondary cavity

Question 3

Psuedocoelomate

Answer 3

Animals with a secondary cavity that is not entirely lined with a mesoderm layer

Question 4

Coelomate

Answer 4

Animals with a true coelom. Fully lined with mesoderm layer

Question 5

Characteristics of Psuedocoelomates

Answer 5

• Most have a pseudocoelom
• Most have an external cuticle
• Most have adhesive glands

Question 6

Nematatoda

Answer 6

• Pseudocoelomate
• Roundworms
• No proto-nephrida

Question 7

Rotifera

Answer 7

-Pseudocoelomate
-Wheel animals
Has protonephridia

Question 8

Early development is related to 4 phenomena

Answer 8

1. Pattern of cleavage
2. Determinism of development
3. Type of coelom formation
4. Blastopore orientation

Question 9

Two types of cleavage

Answer 9

Radial & Spiral

Question 10

Radial cleavage

Answer 10

Non-determinant
Entrocoelus
Deutersomes

Question 11

Spiral cleavage

Answer 11

Determinant
Schyzo-coelus
Protosomes

Question 12

Annelids

Answer 12

• Segmented worms
• Prostomium and pygidium
• Complete digestive system
• Blood through dorsal and ventral vessels
• Dorsal brain

Question 13

Oligochaeta

Answer 13

Earthworms
Lack parapodia
Uniform segments
Deposit feeders
No jaws/palps
Hermaphroditic 
Cocoon with eggs

Question 14

Hyrudeinea

Answer 14

Leeches
Ecto-parasite
Partially lost segmentation
Hermaphroditic 
Cocoon and clitellum

Question 15

Polychaeta

Answer 15

Unjointed appendages
chitin rods and setae
Palps, tentacles

Question 16

Phyla closely related to Annelids

Answer 16

Sipuncula (peanut worms)
Echyura (spoon worms)
Pogonophora (beard worms)

Question 17

Two unique characteristics of mollusks

Answer 17

• Radula

- 3 layer shell

Question 18

Mollusc body plan

Answer 18

1. mantle (& 3 layer shell)
2. mantle cavity
3. Head-foot + visceral mass

Question 19

Molluscs

Answer 19

Open digestive system
Open circulatory system (except squid)
Meta nephridia
Gills or lungs in mantle cavity

Question 20

Classes in annelids

Answer 20

Oligochaeta
Hyrudeinea
Polychaeta

Question 21

Classes in Molluscs

Answer 21

Bivalvia
Gastropods
Cephalopoda

Question 22

Bivalvia

Answer 22

clams, mussels
Sedentary
THESE DO NOT HAVE A RADULA
nervous system underdeveloped
trochophore larvae

Question 23

Gastropoda

Answer 23

Snails, slugs
radula
internal fertilization
egg cases

Question 24

Cephalopoda

Answer 24

squids, octopus, nautilus 
jet propulsion
radula
separate species
external or internal fertilization
highly developed nervous system

Question 25

Arthropods

Answer 25

``` Jointed appendages exoskeleton reduced coelom open circulatory system no gills insects: malpighian tubes spiders: coxal glands crustaceans: green glands well developed nervous system ```

Question 26

subphylums in arthropods

Answer 26

Trilobita Chelicerata crustacea uniramia

Question 27

Trilobita

Answer 27

trilobites 3 tagmata 1 pair antennae

Question 28

Chelicerata

Answer 28

cephalothorax chelicerae padipalps walking legs

Question 29

3 classes in chelicerata

Answer 29

merostomata picnogonida (sea spiders) arachnida

Question 30

crustacea

Answer 30

``` biramous appendages 2 pairs antennae mandibles and maxillae nauplius larvae (zoea & megalopae also larvae) ```

Question 31

Myriapoda

Answer 31

centipedes, millipedes | 2 part tagmata (head + trunk)

Question 32

Malacostraca

Answer 32

``` class in crustacean decapods (crab + shrimp) 5 pairs of legs 1 pair antennae mandibles & maxillae ```

Question 33

Hexapoda

Answer 33

``` uniramia six legs 1 pair antennae compound eyes malphigian tubes well developed nervous sytem ```

Question 34

No metamorphosis

Answer 34

ametabolous insects emerge egg looking like adult wingless adults

Question 35

Incomplete metamorphosis

Answer 35

``` hemi-metabolous egg, nymph, adult young lack wings adults fully form wings ex. dragonflies ```

Question 36

Complete metamorphosis

Answer 36

holo-metabolous egg, larvae, pupa, adult ex. butterflies

Question 37

adaptations in insects

Answer 37

1. waxy cuticle 2. most able to fly 3. small size 4. different mouthparts