K.C.S.E Biology Q & A - MODEL 1997PP1QN13

K.C.S.E Biology Q & A - MODEL 1997PP1QN13

 An experiment was carried out to determine the rate of transpiration in three plants A, B and C. Plants, A and B belonged to different species while plants B and C belonged to the same species. Plant C had all its leaves removed. The three plants were of similar size and were exposed to the same environment conditions. The results are as shown below in the graphs below

​(a) Suggest possible environment conditions under which the experiment was carried out between 30 and 60 minutes
(b) Account for the results obtained for plant C
(c) Suggest the habitat for plant A and B. Give reasons for your answer.
     Habitat for plant A
     Habitat for plant B

ANSWERS

 ​(a)strong air/ winds
   High temperature
   Low humidity; accept dry conditions/ sunlight
(b)Absence of leaves/ stomata absent
   Transpiration; / little transpiration
(c)Arid/dry/ desert/ accept semi- desert
 Reason
   Low rate  of water loss; accept more/ a lot of water loss
   Wet/Moist/aquatic
Reason
   High rate of water/ high rate of transpiration /acc. A lot of water loss