W1-2-60-1-6
JOMO KENYATTA UNIVERSITY OF AGRICULTURE AND TECHNOLOGY
University Examinations 2019/2020
YEAR I SEMESTER I EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE IN FOOD SCIENCE  

SBT 2110:  BOTANY   

DATE:   JANUARY, 2020				        		 TIME:  2 HOURS

Question One 

a)	Differentiate between the following terms as used in flowers.	[1 mark each]

i.	Perrigyny and hypogyny
ii.	Synpetally and apopetally
iii.	Bicarpelate and polycarpelate 
iv.	Zygomorphic and actinomorphic 

b)	Define the herbarium and state any two of its uses.	[3 marks]

c)	Explain how crops may have spread from the centres when they were first cultivated.	[3 marks]

d)	Outline the uses of Gibberellic acids in food production.	[3  marks]

e)	Outline six characteristics of meristematic cells.	[3 marks]

f)	State the similarities of the mitochondrion and the chloroplast.	[4 marks]

g)	Explain how metabolic process of cellular respiration and photosynthesis recycle carbon 	dioxide.	[2 marks]

h)	Describe the physical characteristics of a plant that may change when it is faced with 	drought.		[4 marks]

i)	State Mendel’s laws of heritability and related them to meiotic activities.	[4 marks]

Question Two – 20 Marks

Discuss the characteristics and classification of fruits.	

Question Three – 20 Marks

Discuss pyruvate oxidation in the presence of oxygen and state it significance.	

Question Four – 20 Marks

Discuss the factors that affect the rate of photosynthesis in plants.