| (a) What is the relationship between the two organisms P and Q? |
| (b) During which period do you think organism M was introduced? |
| (c) What new food chain forms between organisms P, Q and M? |
A)
(a)
(b)
(c)
Prey- Predator
X
\[P\to Q\to M\]
B)
(a)
(b)
(c)
Producer-Consumer
Y
\[M\to Q\to P\]
C)
(a)
(b)
(c)
Producer-Consumer
Z
\[Q\to P\to M\]
D)
(a)
(b)
(c)
Prey - Predator
z
\[Q\to M\to P\]
Correct Answer: D
Solution :
| (a) 'P' is prey and 'Q' is predator because population of 'P' increases with increase in population of 'Q'. |
| (b) When graph 1 and graph 2 are compared, graph 2 shows changes during period 'Z', therefore, organism 'M' was introduced during this period. |
| (c) Graph 2 shows that on introduction of 'M', population of 'P' increases and population of 'Q' goes down, thus, 'Q' is eaten by 'M' and 'M' is eaten by 'P'. |
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