The passage describes how biologists study organisms and their environment. Complete the passage by writing a suitable word in each of the spaces.
Organisms interact with both living components and their non-living ____________. A group of individuals belonging to the same species occupying a specific habitat is defined as a ____________. When multiple populations of different species live and interact in the same area, they form a ____________.
To estimate the abundance of sessile organisms like plants, ecological sampling is conducted. A square sampling frame, known as a ____________, is frequently used. To ensure representative and unbiased sampling, these frames should be positioned at ____________ coordinates rather than chosen subjectively.
For each study area, the total count from all frames is divided by the number of frames taken to determine the ____________ density. Replicating this process with many sample frames increases the ____________ of the findings and makes it easier to spot any ____________ data points.
31 exam-style questions on Edexcel IGCSE Biology The organism in the environment. Each one has a worked solution and a mark scheme showing where the marks go.