Individuals, Populations, Communities & Ecosystems (DP IB Environmental Systems & Societies (ESS): SL): Exam Questions

List three biotic interactions occurring between organisms.

Define the term limiting factor in the context of environmental systems and ecology.

Briefly explain what an S population curve represents.

Briefly explain what a J population curve represents.

Define the term community in the context of environmental systems and ecology.

The figure below shows an example of a tool that can be used to help ecologists identify the organisms present within an ecosystem.

State the name of this tool.

Using the tool in part (a), identify the organism shown in the figure below.

Some ecologists captured a random sample of 100 deer and marked them with ear tags.

They then release the marked deer back into the population and allowed them to mix with the unmarked deer.

After a set period of time, the ecologists recaptured a random sample of 50 deer and found that 10 of them were marked.

Using the Lincoln Index, estimate the population size of the deer.

List three abiotic factors that can be measured in an aquatic ecosystem.