ecosystems exam Qs pack 5

Question 1

why do organisms contract when exposed

Answer 1

reduces its surface area to volume ratio, so reduces via ability to predators, reduces energy loss

Question 2

how to analyse a graph of population

Answer 2

does it increase/decrease? why do they increase/decrease?

Question 3

give two reasons a species may decrease

Answer 3

birth rate less than death rate, disease

Question 4

why may one population be affected by the reintroduction of a predator

Answer 4

the prey of the predator might decrease in number as they are also being killed by the predator, other carnivores might decrease in number as there are fewer animals to eat and animals dependent on plants may increase