Practice 2.1 Species and populations with authentic IB Environmental systems and societies (ESS - Old) exam questions for both SL and HL students. This question bank mirrors Paper 1, 2 structure, covering key topics like ecosystems, human impact, and sustainability. Get instant solutions, detailed explanations, and build exam confidence with questions in the style of IB examiners.
Describe three factors that can limit population growth in nature.
Describe two methods used to measure biodiversity in an ecosystem.
Describe two methods used to estimate population size in ecology.
Explain the difference between a population and a community in ecology.
Analyze the following population growth curve:
Identify the type of growth model shown.
Label and explain the significance of the carrying capacity on this graph.
Define the term "species" in biological terms.
Explain the concept of ecological niche and its importance in species coexistence.
Figure 1: Fact file on the round goby (Neogobius melanostomus)
Figure 2:The round goby and mottled sculpin
Using Figure 1 and 2, identify one feature of the round goby that shows it is an r-selected species.
With reference to Figure 1, outline how the round goby both positively and negatively affects the St Lawrence River ecosystem.
With reference to Figure 1, explain why the realized niche of the mottled sculpin has changed in recent years.
Figure 1: Fact file on North American beavers
Source: adapted from www.sbaa.ca, www.ecology.info, www.tobyhemenway.com and http://acs7.cortland.edu
Figure 2: Algonquin wolf pack territories and protected areas
With reference to Figure 1, outline one reason why there are more beaver remains in wolf faeces during summer.
The number of wolves in Algonquin Provincial Park is estimated to be between 250 and 1000. Outline two reasons why it is so difficult to estimate the number of wolves accurately.
With reference to Figure 2, explain the threats to the future existence of a small and sustainable population of wolves as a result of their protection in limited area.
Explain how the following concepts relate to population dynamics:
Carrying capacity
Exponential growth
Practice 2.1 Species and populations with authentic IB Environmental systems and societies (ESS - Old) exam questions for both SL and HL students. This question bank mirrors Paper 1, 2 structure, covering key topics like ecosystems, human impact, and sustainability. Get instant solutions, detailed explanations, and build exam confidence with questions in the style of IB examiners.
Describe three factors that can limit population growth in nature.
Describe two methods used to measure biodiversity in an ecosystem.
Describe two methods used to estimate population size in ecology.
Explain the difference between a population and a community in ecology.
Analyze the following population growth curve:
Identify the type of growth model shown.
Label and explain the significance of the carrying capacity on this graph.
Define the term "species" in biological terms.
Explain the concept of ecological niche and its importance in species coexistence.
Figure 1: Fact file on the round goby (Neogobius melanostomus)
Figure 2:The round goby and mottled sculpin
Using Figure 1 and 2, identify one feature of the round goby that shows it is an r-selected species.
With reference to Figure 1, outline how the round goby both positively and negatively affects the St Lawrence River ecosystem.
With reference to Figure 1, explain why the realized niche of the mottled sculpin has changed in recent years.
Figure 1: Fact file on North American beavers
Source: adapted from www.sbaa.ca, www.ecology.info, www.tobyhemenway.com and http://acs7.cortland.edu
Figure 2: Algonquin wolf pack territories and protected areas
With reference to Figure 1, outline one reason why there are more beaver remains in wolf faeces during summer.
The number of wolves in Algonquin Provincial Park is estimated to be between 250 and 1000. Outline two reasons why it is so difficult to estimate the number of wolves accurately.
With reference to Figure 2, explain the threats to the future existence of a small and sustainable population of wolves as a result of their protection in limited area.
Explain how the following concepts relate to population dynamics:
Carrying capacity
Exponential growth