18/05/2023

                    i.            The internal structure of the root which is composed of single layer of barrel shaped parenchymatous cells is called……..

A.     Cortex

B.     Epiblema

C.     Pericycle             

                                                                               

D.    Endodermis

E.      Medulla

                  ii.              Which of the following method of adulteration may occur due to incorrect storage?

A.    Admixture

B.     Substitution

C.     Sophistication with inferior varieties                                                                                                                                                   

D.    Spoilage of drug

E.     Deterioration

                iii.            Which type of vegetative propagation is extensively used in the manufacture of antibiotics, lysergic acid derivatives and some vitamins?

A.     By layer

B.     By division

C.     By inoculation                                                                                                                             

D.    By fermentation

E.     By cutting

                iv. Which of the following is the Characteristics of Collenchyma Tissues?

A.    Is the precursor of all the other tissues 

B.     Have dense cytoplasm with large nuclei

C.     Provide rigidity of the seed-coat                                                                                                                         

D.    Form the ground tissue in a plant                                                                                                                                

E.     Strengthen young organs

 

                  v.            Consider function of the Endoplasmic Reticulum…….

A.     It transports materials through the cell and produces proteins

B.     It packages and transports materials (proteins and carbohydrates) to different locations

C.     It controls many of the functions of the cell (by controlling protein synthesis)

D.    It is a small body located near the nucleus that forms and organizes microtubules

E.     Contains DNA (genetic material in chromosomes)

                vi.            A flower pollinated by insects have the following features…

A.    May have pollens which floats on water

B.     Have white flowers with strong fruity smell and open at night

C.     Are log tube shaped, have bright red or yellow colours, and with no fragrance 

D.    Have bright colours, sweet fragrance and produce nectar

E.     have large stigmas, no or little fragrance, and non- sticky pollens

              vii.             Which of the following plant shows destructive allelopathy antibiosis?

A.    Digitalis

B.     Ocimum basilicum

C.     Belladonna and mustard                                                                       

D.    Urtica dioica

E.     Nicotiana

            viii.            An example of Exalbuminous seed is ……..

A.    Nux vomica

B.      Wheat

C.      Rice                                                                                                           

D.     Linseed

E.      Soya beans

                ix.            Which of the following method of drying is more suitable for use in the wet weather?

A.     Lyophilisation

B.       Sun Drying

C.     Shade Drying

D.    Artificial Drying                                                                                                     

E.     Vacuum Drying

                  x.            The effect of Oxygen on stored volatile oil is called………………..

A.    Deoxygenization

B.     Decomposition

C.     Rancidification                                       

D.    Resinification

E.     Oxydation

 

·            Responses with letters “T” and “F” will not be awarded any mark

·            There will be a penalty of half (½) of allocated marks for responses with small letters.

 

1.      Characteristics features of Ground or Fundamental Tissue System

A.    …….… In monocot stem, ground tissue system is a continuous mass of parenchymatous tissue in which vascular bundles are found scattered

B.     …….… These cells are arranged in a single layer without intercellular spaces

C.     …….…  Form the main body of the plants (bulk of plant)

D.    …….…Includes all the tissues including epidermis and vascular bundles

E.     …….… In the roots, ground tissue is made of chlorenchyma tissues forming the mesophyll

 

2.      Sieve elements……….

A.    …….… formed from pro-cambium of apical meristem

B.     …….… Have cytoplasm and a prominent nucleus

C.     …….… conducting zone of phloem

D.    …….…arranged one above the other and form vertical sieve tubes 

E.     …….…In matured sieve tube, nucleus is present

3.      Regarding characteristics of Parenchyma Tissues Tissues

A. …….… Is the precursor of all the other tissues

B. …….… Form the ground tissue in a plant

C. …….… Have dense cytoplasm with large nuclei

D …….… Their cell walls are thin, elastic and made up of cellulose

E. …….… Have smaller vacuoles, scattered throughout the cytoplasm

4.      Which of the following statements is/are correct concerning of Dicot stem Cortex

 

A. …….…  It lies below the epidermis

B …….…the third zone made of barrel shaped cells arranged compactly with intercellular spaces

C. …….… The second zone rich in starch

D …….…First zone consists of a single layer of parenchymatous rectangular cells

E …….…Some resin ducts occur in second zone

 

1.       PART ONE: Match descriptions in column B with responses in column A by writing the letter of the correct response in the space provided on each option.

COLUM A	ANSWERS	COLUM B
1. Receptacle		A.      made up of sepals B.      made up of petals C.      bears the floral organs D.     Grains containing the male gametes E.      female part of the flower F.       male reproductive structures of the flower G.     formed from sepals and petals together
2. Calyx
3. Corolla
4. Perianth
5. Pollen

PART TWO: Match the item in column B with examples in column A by writing the letter of the correct answer in the space provided

COLUM A	ANSWERS	COLUM B
1.        Tegmen		A.      the outer seed coat B.     Expansion of placenta or funicle over the surface of the seed C.     A structure that attaches the seed to the placenta D.    Fleshy structures rich in lipids and proteins attached to the seed E.     The inner seed coat F.      An opening that marks position of the radicle G.    A structure that arises from the testa near the hilum
2.       Funicle
3.    Testa
4.       Aril
5 .      Strophiole

 

 

1.       List four types of Multicellular branched trichomes 4 amrks

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2.       What do you understand by the following main inflorescences   6 marks

a.       Raceme (or racemose)

………………………………………………………………………………………………………………………………………

b.       Spadix

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

c.       Spike

…………………………………………………………………………………………………………………………………………

d.       Corymb

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

e.       Umbel

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

f.        Capitulum or Head:

……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

 

3.        Outline five general conditions and techniques when drying Fruits and Seeds     5marks

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4.        With three points describe Taxonomic classification of medicinal plant 3marks

…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………...

 

5.       Give shortly explanation on the following ways on how adulteration occurs

Fault of collection

…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

 improper preparation

…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

 improper storage

…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

6.       Give three differences between  meristematic tissues and permanent tissues 6 marks

Meristematic tissue	Permanent tissue

 

 

 

 

7.        Mention four special additives containing in water (H₂O) and aqueous solutions 4marks

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………..

 

 

 

 

8.        With three examples, describe how Temperature affects plant chemical reaction rates

                                                                                                                                           6 marks

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 SECTION E: GUIDED ESSAY QUESTIONS                             (30 MARKS)

INSTRUCTIONS:

·         This section consists of Two (2) questions which are supposed to be answered in a narrative way

·         Write your answer on the empty pages of this question paper; each question should start on a new page.

·         There will be a penalty of three (3) marks if questions are not answered in essay form

 

 

1.      Explain the following components of phloem: Sieve elements (five points), Companion cells (four point), phloem parenchyma (three points), phloem fibres (three points)

2.      Explain classification of the leaf based on the following:

Leaf margins (five types)

Leaf Apex (five types)

Leaf surface (five types)