K.C.S.E Biology Q & A - MODEL 2001PP1QN16

K.C.S.E Biology Q & A - MODEL 2001PP1QN16

An experiment was carried out to investigate the nutritional value of two dry powder animals feeds X and Y over a period of six months. Twenty 5 month’s old castrated goats were use. The goats were divided into two equal groups A and B.
The animal’s in group A were fed on feed X throughout the experiment while those of group B were fed on feed Y. The feeds were supplemented with dry hay and water. The average body weight of
each group of goats and the weight of the dry powder feeds were determined and recorded each month. The faeces produced by each group was dried and weighed and the average dry faecal output per month was also recorded. The results are as shown below.

(a) (i) What is the relationship between the amount of feed and the faecal output
(ii) Work out the average increase in weight for the animal’s in group A during
The first four months
The last two months
(iii) Account for the average increase weight in goats in group A during the first four months
The last two months
(iv) Which of the two feeds is more nutritious?
Give reason for your answer
(b) State four uses of digested food in the bodies of animals
(c) State four uses of water in the bodies of animals

answers

(a) (i) The more the feed the  more the feacal output
The less the feed the less the faecal output
(ii) The first four months

iii) Fast/ rapid/Active growth hence increase in weight
The last two months
Slow growth, reached maturity
iv) Feed X
Give reason for your answer
Group A gained (more) weight, on less food while group B lost
weight on more food.
b) growth, repair, protection, energy production
c) a solvent, transport medium.. Hydrolyses of food, maintenance of temperature.