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n Am I B I A U n IV E R S I TY OF SCIEnCE AnD TECHnOLOGY

FACULTY OF HEALTH AND APPLIED SCIENCES

DEPARTMENT OF NATURAL AND APPLIED SCIENCES

QUALIFICATION: BACHELOR OF SCIENCE (MAJOR AND MINOR)

QUALIFICATION CODE: 07BOSC LEVEL: 6

COURSE: EVOLUTION OF BIOLOGICAL DIVERSITY COURSE CODE: EBD601S

DATE: JUNE 2016

DURATION: 3 Hours

EXAMINER(S)

MODERATOR:

SESSION:

MARKS: 110

FIRST OPPORTUNITY EXAMINATION QUESTION PAPER

Dr. Jeya Kennedy

Mr. Munyaradzi Zivuku

INSTRUCTIONS 1. Write clearly and neatly

2. Number the answers clearly

3. All written work MUST be done in blue or black ink

4. No books, notes and other additional aids are allowed

5. Mark all answers clearly with their respective question numbers

THIS QUESTION PAPER CONSISTS OF 6 PAGES {Including this front page)

1

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QUESTION 1: MULTIPLE CHOICES QUESTIONS [10]

1.1 Skates belong to the class; (1)

a) Myxini

b) Chondrichthyes

c) agnathans

d) Osteichthyes

1.2 One characteristic of many lampreys but not of hagfishes is, (1)

a) a parasitic lifestyle

b) a cartilaginous skeleton.

c) the presence of unpaired fins.

d) the presence of jaws

1.3 Genetic drift is most likely to occur in; (1)

a) small populations

b) large populations

c) populations that migrate

d) populations that have a low frequency of mutation

1.4 The giant kelp belongs to the group known as; (1)

a) green algae

b) brown algae

c) red algae

d) golden algae

1.5 Glomeromycetes; (1)

a) reproduce mainly by sexual spores called glomerospores

b) are characterized by unique structure called polar tubes

c) associate with cyanobacteria to form lichens

d) form arbuscular endomycorrhizal with tree root

2

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1.6 Ctenophores move through the water by; (1)

a) somersaulting

b) contracting their bell-shaped bodies

c) beating their cilia

d) rotating like a propeller

1.7 The gastrovascular cavity of a flatworm; (1)

a) has no opening to the outside

b) has a single opening

c) has two openings

d) is connected to the outside by numerous pores

1.8 The subphylum Crustacea includes; (1)

a) insects

b) spiders

c) ticks

d) shrimps

1.9 The part of a frog's heart that pumps blood to the lungs and the rest of the body is the; (1)

a) ventricle

b) left atrium

c) right atrium

d) sinus venosus

1.10 A spider's respiratory system may include; (1)

a) tracheae

b) spinnerets

c) pedipalps

d) chelicerae

3

QUESTION 2: DEFINE THE FOLLOWING TERMS

2.1 Spicule-

2.2 Conidium-

2.3 Trichinosis-

2.4 Nephridium -

2.5 Malpighian tubule-

2.6 Mantle-

2.7 Furcula-

QUESTION 3: DISTINGUISH BETWEEN THE TERMS IN EACH OF THE FOLLOWING

PAIRS OF TERMS.

3.1 Proglottid, tegument-

3.2 Directional, Disruptive selects-

3.3 Basidium, basidiocarp-

3.4 Cnidocyte, nematocyst-

3.5 Pulmonary circulation, systemic circulation-

3.6 Shaft, vane-

[7]

(1)

(1)

(1)

{1)

(1)

{1)

{1)

[12]

(2)

(2)

{2)

(2)

{2)

(2)

4

QUESTION 4: SHORT ANSWER

4.1 Name the pigment found in red algae.

4.2 What is one potential negative consequence of non-random mating based on geographic

proximity?

4.3 Describe how protozoans use pseudopodia to move and to capture food.

4.4 How do the above-ground, sexual reproductive structures of basidiomycetes differ in

appearance from those of ascomycetes?

4.5

4.6

4.7

4.8

4.9

Explain how a barnacle feeds.

Describe how some sharks' teeth are adapted to capturing large fish or mammals.

Identify three ways that arthropods show cephalization.

What are the two substances that a sponge's skeleton may be made of? How do these substances differ?

Name the 3 types of lichens and describe them.

QUESTION 5: ANSWER THE QUESTIONS

5.1 Identify the structures labeled A-Fin the diagram of a cnidarian body shown below.

A

5.2 Sketch and describe the unique structure of Phaeophyta.

[20]

(1)

(2}

(2}

(2}

(2}

(2}

(3}

(3}

(3}

[16]

(6}

(10}

5

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QUESTIONS 6: EASSY QUESTIONS

ANSWER ONLY THREE QUESTIONS FROM THIS SECTION

6.1 Explain the life cycle of an Ascomycota with the diagram.

6.2 Discuss five prezygotic isolating mechanisms and three postzygotic

isolating mechanisms with examples.

6.3 Describe the key characteristics of monotremes, marsupials and placental

mammals with two examples each.

6.4 Describe the Characteristics, Movement & Growth of Arthropods.

THE END

[45]

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6