Zool 250 - SAMPLE LECTURE EXAM QUESTIONS

PART I (50%) SAMPLE MULTIPLE CHOICE QUESTIONS
(2 marks each)

NOTE: ANSWER ALL MULTIPLE CHOICE QUESTIONS ON THE OPTICAL SCORING SHEETS. USE THE EXAM SHEETS ONLY FOR YOUR OWN PERSONAL NOTES.

For each statement below, indicate the one choice that yields the single best answer.

(Note the different forms a multiple choice answer may take).

1) Radial, indeterminate cleavage:
a) is observed in a few the most advanced ciliophorans..
b) is believed to be the primitive state in the Metazoa.
c) is not observed in either protostome or deuterostome animals.
d) All of the above.
e) (a) and (b) but not (c).

2) Regarding cilia and flagella:
a) they do not differ at the ultrastructural level.
b) protists bearing flagella rarely have more than two.
c) they both exhibit the same pattern of movement when beating.
d) All of the above.
e) (a) and (b) but not (c).

3) All living Protista possess:
a) a membrane-bound nucleus.
b) one or more mitochondria.
c) one or more chloroplasts.
d) All of the above.
e) (a) and (b) but not (c).

4) Sponges:
a) do not exhibit true tissues.
b) do not possess a gut.
c) do not possess an endoderm.
d) All of the above.
e) (a) and (b) but not (c).

5) Syconoid sponges differ from asconoid sponges because:
a) syconoid choanocytes may pump water in either direction.
b) the pumping of water by syconoid choanocytes is assisted by ciliated ostial (pore) cells.
c) syconoid choanocytes line the entire spongocoel.
d) None of the above.
e) (a) and (b) but not (c).

6) Choanoflagellate (choanocyte) cells of sponges:
a) pump water with an individual flagellum.
b) filter food particles via a sieve of microvilli surrounding the flagellum.
c) produce sperm and sometimes eggs during reproduction.
d) All of the above.
e) (a) and (b) but not (c).

7) A nematocyst:
a) is an intracellular organelle that aids in prey capture and defense in cnidarians.
b) may be fired only once.
c) is just another name for a cnidocyte.
d) All of the above.
e) (a) and (b) but not (c).

8) Regarding the Cnidaria:
a) all classes include life cycles that alternate between a polyp and a medusa form.
b) all classes have a well-developed gastrovascular cavity that lacks an anus.
c) all classes exhibit a triploblastic grade of complexity.
d) All of the above.
e) (a) and (b) but not (c).

9) In the Hydrozoa:
a) the gastrovascular cavity of the polyp form has well-developed septae.
b) the medusa form tyically lacks a manubrium.
c) gastrodermal nematocysts are lacking.
d) All of the above.
e) (a) and (b) but not (c).

10) Which of the following taxa does not belong to the same cnidarian class as the others:
a) Hydrocorals
b) Hydroids
c) Gorgonians
d) Siphonophores
e) Trachyline medusae

11) Ctenophores:
a) are mainly pelagic and have a well-developed gelatinous middle layer.
b) are the largest metazoans to swim using cilia.
c) have larger cilia in their comb rows than any other living metazoan.
d) All of the above.
e) (a) and (b) but not (c).

12) Unlike most protostomes, deuterostomes exhibit:
a) radial, indeterminate cleavage.
b) a mouth that does not derive from the larval blastopore.
c) coelom formation by schizocoely.
d) All of the above.
e) (a) and (b) but not (c).

13) Platyhelminthes is considered a primitive phylum in the Protostomia because:
a) a coelom is lacking.
b) an anus is lacking.
c) a nervous system is lacking.
d) All of the above.
e) (a) and (b) but not (c).

14) Unlike most turbellarians, the epithelium of parasitic platyhelminth classes:
a) is syncytial.
b) lacks cilia.
c) lacks microvilli.
d) All of the above.
e) (a) and (b) but not (c).

15) A proglottid:
a) is a structure just inside the mouth in a fluke (Trematoda).
b) allows trematodes to 'taste' the incoming fluids from their host.
c) is a gamete-producing segment of a tapeworm (Cestoidea).
d) All of the above.
e) (a) and (b) but not (c).

16) The cuticle of many aschelminth taxa:
a) is a layer of non-living material that lies outside the epidermis.
b) may be composed of chitin or collagen.
c) does not need to be molted in taxa where it is quite thin.
d) All of the above.
e) (a) and (b) but not (c).

17) Eutely:
a) occurs in at least two different platyhelminth phyla.
b) refers to the situation where adult of a species are formed from a fixed number of cells.
c) refers to the situation where adult of a species regulate their osmotic balance hydrostatically.
d) All of the above.
e) (a) and (b) but not (c).

18) The Porifera, Cnidaria and Platyhelminthes all:
a) lack a coelom.
b) lack an anus.
c) lack a mesoderm layer.
d) All of the above.
e) (a) and (b) but not (c).

19) The planula is a larval stage observed in the:
a) Cnidaria.
b) Platyhelminthes.
c) Arthropoda.
d) All of the above.
e) (a) and (b) but not (c).

20) Both protonephridia and metanephridia:
a) are multicellular excretory systems associated with a coelom.
b) depend on cilia or flagella to transport wastes outside the body.
c) possess a distinct, flagellated 'terminal cell' or 'flame cell'.
d) All of the above.
e) (a) and (b) but not (c).

PART II (40%) SAMPLE FILL-IN-THE-BLANK QUESTION.
(2 marks per item unless noted otherwise) 

21) What is the name (2-marks each) and the main function (2-marks each) of each of the two kinds of nuclei in the Ciliophora:

     a)  ________________________________________________________________________

     b)  ________________________________________________________________________

22) The three 'body plans' of sponges are referred to as:

       _______________________    _______________________    _______________________

23) List two anatomical features:

     that Anthozoan polyps possess but      a)  ___________________________________
        Hydrozoan polyps do not:
                                            b)  ___________________________________

     that Scyphozoan medusae possess but    c)  ___________________________________
        Hydrozoan medusae do not:
                                            d)  ___________________________________

24) In turbellarians, the two different     a)  ___________________________________
    types of reproductive systems, each 
    of which has a distinctive type of egg, b)  ___________________________________
    are called the:

25) Two phyla that exhibit a diploblastic   a)  ___________________________________
    body organization are:
                                            b)  ___________________________________

PART III (10%) SAMPLE LONG ANSWER QUESTION.
(10 marks)

26) Using labelled diagrams, illustrate the significant similarities and differences between the ascon, sycon and leucon types of sponge organization.

 

 

 

 

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