A Level Biology Practice Exam

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What is a line transect used for in ecological studies?

To measure pH levels in soils
To mark boundaries of urban areas
To collect samples at specified points along a line
To identify species of trees in a forest

The correct answer is: To collect samples at specified points along a line

A line transect is a method commonly used in ecological studies to collect data regarding the distribution of organisms and the characteristics of a particular habitat. By laying out a straight line across a study area, researchers can collect samples at specified points along that line, allowing for systematic sampling of the environment. This approach is beneficial for examining patterns of biodiversity, species abundance, and how these factors may change across different habitats or environmental gradients. This method typically involves measuring various factors such as species presence or abundance at regular intervals along the transect, enabling researchers to draw conclusions about spatial distributions and associations among species and their environments. It also helps in assessing changes in ecosystem health or the understanding of ecological relationships over space.