Page 5 - WS-2
P. 5
(a) Christina wants to increase the number of eggs per year by using
selective breeding. Which two chickens should she breed together and
why?
(b) Write one example of each poultry breeds.
(i) Indigenous breed
(ii) Exotic breed
(c) State any two ways to control the loss of poultry during outbreak of a
disease.
(d) Mention any two desirable characters to be taken into consideration
for cross breeding.
Q19. (a) What are the major group of activities involved for improving of crop 5
yields?
(b) What are the factors on which crop variety improvement depend on?
(c) Name the nutrients and their sources required by the plants.
Q20. Many fish stocks have declined. 5
Marine ecologists considered the three topics shown in figure given below
when they discussed the decline of fish stocks.
Describe the key points for each of the three topics shown in above figure.