Question

Some students wanted to find the number of thistle plants growing on a lawn.

The students placed 10 quadrats at different positions on the lawn.


Which method should the students use to decide where to place the 10 quadrats?


A. Place the quadrats as evenly as possible around the lawn.

B. Place 5 quadrats in areas with many thistle plants and 5 quadrats in areas with only a few thistle plants.

C. Place all the quadrats randomly on the lawn

Answer 1

Place the quadrats as evenly as possible around the lawn is the method should the students use to decide where to place the 10 quadrats.

A quadrat is a traditional square frame used in ecology, geography, and biology to isolate a standard unit of area for the study of an item's distribution over a large area.

Quadrats should be placed at random in order to obtain a representative sample. A large number of quadrats should be placed in order to obtain a representative sample. Quadrats can also be used to study slow-moving animals like snails and slugs.

Quadrat sampling is a method of directly counting organisms in a specific proportion (sample) of the habitat. It is employed in the estimation of population abundance (number), density, frequency, and distribution. The quadrat positions are chosen at random or along a transect.

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