quiz

 

1.       With at least five points give shortly description of dicot stem epidermis  5 amrks

a.       It consists of a single layer of parenchymatous rectangular cells

b.       Epidermal cells are compactly arranged without intercellular spaces

c.       Epidermis is covered on the outside by cuticle made up of waxy substance

d.       The cuticle checks/controls transpiration

e.       Stomata may be present at irregular intervals

f.        A large number of multicellular hairs occur on the epidermis

 

 

2.       Mention  six  types of surface of the leaf     6 marks

Farinose, glabrouse, verucose, viscid, pubescent, hirsute, glandular

3.        List four  forms in which a seed may be produced    4marks

orthotropous ovules, campylotropous or anatropous ovules, hemitropous, amphitropous and circinotropous

 

4.        List two examples of natural occurring hybrids  2marks

Mentha piperita and M. spicata

5.       A. What do you understand by vegetative propagation by Division?

 By division, a term usually applied to the separation of a plant which has a number of aerial stems or buds, into separate parts each having roots and a growing point

B. List four plants that used by Division method of propagation

althaea, rhubarb, gentian and male fern

6.       Flowers are grouped according to the placement of floral parts on the receptacle into: Outline three types 6 marks

a.       Hypogynous flowers

Sepals, petals, and stamens are attached to a convex or conical receptacle at the base of the ovary

The ovary is called superior and the perianth is inferior or hypogynous

b.      Perigynous flowers

Sepals, petals, and sometimes stamens borne on the edge or margin of the receptacle and appear to form a cup around the pistil

c.       Epigynous flowers

Sepals, petals, and stamens appear to arise from the top of the ovary

The ovary is inferior and the perianth is superior or epigynous

 

 

7.        Mention five important of  processing of crude drugs  5marks

1.       Improve the purity of the plant part being employed

2.       Prevent damage from mould, other microorganisms and insects

3.       Reducing drying time

4.       Detoxify indigenous toxic ingredients

5.       Enhance therapeutic efficacy

 

8.        With two examples, describe Decoction method of extraction 6 marks

Decoction

a.       Decoction: In this process, the crude drug is boiled in a specified volume of water for a defined time; it is then cooled and strained or filtered. This procedure is suitable for extracting water-soluble, heat stable constituents. e.g. Tea , Coffee