Exam 4 Practice

1.     The Arthropods… (CATA)

a.   Make up more than 75% of all known species of animals

b.   Are more widely and more densely distributed throughout the world than members of all other phyla put together

c.   Are segmented eucoelomate protostomes with well-developed organ systems

d.   None of the above are correct

2.     The uniquely derived rasping tongue of the Gastropoda is called the (CATA)

a.     Radula

b.     Odontophore

c.     Mastax

d.    Buccal cavity

e.     None of the above is correct

3.     Chelicerate arthropods have which of the following? (CATA)

a.     Pedipalps

b.     Antennae

c.     Mandibles

d.    Three pairs of walking legs

4.     Which of the following is found in the shell secreted by the mantle of the Bivalvia? (CATA)

a.     Periostracum

b.     Nephrostom

c.     Prismaic layer

d.    Nacreous layer

5.     There is a tendency for somites to be combined into functional groups called…

a.     Segments

b.     Tagmata

c.     Metameres

d.    All of the above are correct

e.     None of the above is correct

6.     Which of the following is mismatched? (CATA)

a.     Gastropoda – snails, slugs, nudibranchs

b.     Bivalves – clams, mussels

c.     Polyplacophora – conch, chitin

d.    Cephalopoda – squid, nautilus

7.     T/F – The coelom of arthropods is reduced in the adults and the circulatory system is open with only a weakly developed dorsal heart.

8.     T/F – Torsion is a 180 degree rotation of the body of a Gastropod

9.     Which of the following serves a respiratory function in arthropods? (CATA)

a.     Body Surface

b.     Gills

c.     Tracheae

d.    Book lungs

10.   A potentially disastrous ecological event occurred when ___ were introduced into the Great Lakes

a.     Leeches

b.     Boring clams

c.     Zebra mussels

d.    Shipworms

11.    T/F – The cuticle is an outer covering secreted by the underlying epidermis.

12.   T/F – In the squids, most of the shell has disappeared, leaving only a thin, horny strip called the pencil.

13.   In crustaceans, the procuticle is also impregnated with…

a.     Nitrates

b.     Phosphates

c.     Calcium salts

d.    Potassium salts

14.   Which of the following is NOT correct?

a.     The Mollusca have metanephridia for a circulatory system

b.     Molluscan larvae are primitively a trochophore, but many have a veliger lavae and some have direct development

c.     The molluscan coelom is reduced

d.    The cephalopods have the most highly developed molluscan sensory organs

e.     All of the above are correct

15.   Which of the following is incorrect?

a.     Chitin – inert polysaccharide bound with protein

b.     Nauplius – larval form of Crustaceans

c.     Ecdysis – the actual process of shedding the old exoskeleton

d.    Metamorphosis – the direct development of an adult from an egg

16.   Which of the following is mismatched?

a.     Operculum – an opening in the shell of a gastropod

b.     Torsion – a phenomenon that moves the mantle cavity and twists the visceral organs

c.     Coiling – a spiral winding of the shell and visceral mass, different from torsion

d.    Ctenidium – carries out respiration activities in many gastropods

17.   T/F – Current thinking is that the subphylum Trilobita had their evolutionary origins before the Cambrian period, and living species today closely resemble those extinct species from 200 million years ago.

18.   T/F – Many Cephalopods exhibit a closed circulatory system

19.   Which of the following groups does not belong to Subphylum Chelicerata?

a.     Class Merostomata

b.     Class Hexapoda

c.     Class Arachnida

d.    Class Pyconogonidia

20.  T/F – Burrowing shipworms belong to Class Gastropoda

21.   Which of the following groups does NOT belong to the Class Arachnida?

a.     Mites

b.     Ticks

c.     Harvestmen

d.    Scorpions

e.     Sea Spiders

22.  Which of the following is a Characteristic of Phylum Mollusca (CATA)

a.     Mosaic blastula development

b.     Mantle cavity that houses the ctenidia

c.     Protonephridia for waste excretion

d.    Digestive, Excretory & Reproductive systems

23.  T/F – Arachnid tagmata consist of a cephalothorax and abdomen.

24.  Which of the following has both trochophore and veliger larvae stages (CATA)

a.     Polyplacophora

b.     Gastropoda

c.     Bivalvia

25.  Which of the following is NOT correct?

a.     Spiders seize their prey with their chelicerae and inject venom

b.     The anterior chewing appendages on the head are called mandibles

c.     All spiders are predators

d.    Spiders usually have eight simple eyes

26.  T/F – Most molluscs are dioecious but a few are hermaphroditic.

27.  Class Gastropoda has the following modifications (CATA)

a.     A 180 degree body coiling

b.     A reduction of the mantle cavity

c.     An increase in the number of gills

d.    Restricted water flow

28.  T/F – Class Bivalvia have an enlarged mantle cavity and a spade-like foot