HIGHER PLANTS Questions

HIGHER PLANTS (BOTS2202)

Biological Science - BS

Semester: Second Semester

Level: 200

Year: 2017

Answers (200 )

REPUBLIC OF CAMEROON THE UNIVERSITY OF BAMENDA

Peace-Work-Fatherland

P. O. BOX 39 Bambili

School/Faculty: _SCIENCE____________ Department:_Biological Sciences

Lecturer(s): _Pr MENDI and TAGHAM

Course Code: _BOTS2202_______ Course Title: HIGHER PLANTS

Date: _22/09/2017_______Halls: __ASANJI ________Time: 2 HRS

Instructions: Answer all questions CHRONOLOGICALLY

PART I (20 marks)

1. Enumerate three biological contributions of the phylum chordata. 3mks

2. How does the sea lamprey differ from:

True eels? 2mks

ii.

Gulf of marine eels? lmk

3. Adult sea squits have only one main chordate characteristic which is ……lmk

4. In tetrapod vertebrates the pharyngeal pouches give rise to the following structures: I …..II ……..III

………..IV ……………..2mks

5. Name 4 modifications of the skin amongst the various classes of vertebrates. 2mks

6. Outline in a tabular form only, the differences between hag fishes and lampreys 2mks

7. …………… are the most primitive of the true vertebrates, lmk

8. How do lampreys and hag fishes depart from the fundamental plan of the digestive system of

vertebrates? 2mks

9. Give two examples each of fishes or fish groups that have the following caudal fin types;

Heterocercal and diphycercal caudal fins. 2mks

10. Oviparous fish may be further categorized as being either …… or …………….. 2mks

PART II (30 marks)

A-Instructions for multiple choice questions (10 marks): Right answer = 1 mark; Wrong answer = -

0.5 mark; no answer = 0 mark. Write only the letter corresponding to the correct answer.

1-During the practical section three you observed the structure of Gallus gallus liver and you noticed

that it has: a) two lobes; b) five lobes; c) three lobes; d) four lobes; e) one lobe.

2- According to the evolutionary concept, vertebrate life originated from:(a) water; b) both water and

land; c) land; d) air.

3- The first animal groups which invaded terrestrial habitat were:a) amphibians; b) pulmonate snails

and tracheate arthropods; c) reptiles; d) mammals

4- The two evolved features that would be important ‘for permitting the subsequent evolution for life

on land by some primarily aquatic vertebrates are: a) gills and lungs; b) gills and fins; c) lungs and

limbs; d) gills and limbs.

5- In Proteidae subfamily of salamanders, the adults: a) have reduced lungs; b) lack posterior limbs;

c) lack gills d) gills and lungs.

6-Fertilization of the salamanders is: a) usually internal and external; b) 20% species practice internal

fertilization; c) 10% species practice external fertilization; d) 5% species practice both external and

internal fertilization.

7- Perennibranchiate condition occurs only in: a) frogs; b) toads, (c) salamanders; d) caecilians.

B- The uppermost chromatophores in the dermis of amphibians are xanthophores and contain: a)

yellow and silver pigments; b) black and orange pigments; c) white and orange pigments; d) yellow

and orange pigments

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9. The nervous system of amphibians is composed of: a) 10 pairs of cranial nerves and 10 pairs b) 31

pairs of cranial nerves and 31 pairs of rachidial nerves c) 12 pairs of cranial nerves and 12 pairs of

rachidial nerves d) 10 pairs of cranial nerves and 31 pairs of rachidial nerves.

10. The major element that distinguishes the reptiles, birds and mammals from other vertebrates- is. a)

presence of b) presence of limbs; c) anamniotic egg d) amniotic egg.

11. The major factor in the diversification of lizards and snakes is: a) skull mobility b) temporal

opening; c) success in arid habitats; d) Jacobson’s organ.

12. The Sense function used by snakes to hunt their prey is: a) chemical senses; b) vision; c) hearing;

d) sense of breathe

13. Reptiles periodically shed the outer epidermal layers of the skin in process called; a) molt; b)

metamorphosis; c) domorphosis; d) ecdysis.

14. Locomotion of snakes is assured by: a) muscles; b) ribs and scales; c) vertebrae; d) skin and

muscles

Short answers questions

1-Beyond the obvious difference in water content, there are several important physical differences

that animals must accommodate when moving from land to land. List them (0.5x4=2 marks)

2- Define the term paedomorphosis, in which group of animals paedomorphosis occurs. According to

you what is the cause of paedomorphosis? How you can solve the paedomorphosis problem in these

animals? (14-1+2+2=6 maries)

3-What is the excellent mechanism for conserving water in reptile body which is found in other groups

living successfully in arid habitats (2 marks)

C-Copy and complete the following table: 5 marks

PART III (20 marks)

Instructions: Answer all questions concisely (using one word or short phrases). No need for long

write-ups.

1) What is the importance of endothermy to birds and mammals? ……… 1mk

2) List 3 adaptations of birds to flight………………………………………3 mks

3) In a tabular form, give the different parts of the digestive system of a bird and state one function of

each ……….. 4mks

4) Give the importance of fur to mammals ……………………………………….. 2mks

5) Name the 3 modes of reproduction used by mammals and give an example of an animal in each

category …………………………………………………………………………… 4mks

6) In a tabular form, list the different types of teeth found in mammals and state their function(s)

……………………………………………………………………………………………. 6mks

Characteristics

Species

Common characteristics Specific characteristics

Pseudotolithus typus

Bufo maculatus

Rana esculent a

4-Hemiclactylus mabuia

Gallus gallus

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