NEET BIOLOGY

Detailed explanation-1: -Step 1-Calculate the mean number of dandelions per quadrat. Mean = 4 + 5 + 2 + 0 + 1 + 5 + 3 + 2 + 5 + 3 = = 3 dandelions per quadrat. Step 2-Calculate the total area of the quadrat. If the quadrat is 0.5 m by 0.5 m, the area is 0.5 × 0.5 = 0.25 m 2.

Detailed explanation-2: -You simply determine many small areas (or points) to be sampled and record whether the organism was observed or not. To do this with the dandelions, we would have had to look only at the very center point of each sampling frame, and recorded whether there was a dandelion present or not.

Detailed explanation-3: -The quadrat equation uses the population density to calculate the estimated total population or N: N = (A/a) x n, where A is the total study area, a is the area of the quadrat, and n is the population density.

Detailed explanation-4: -To do this, simply count the number present in a series of quadrat samples then divide the total by the number of samples to get an average count per quadrat. If you know the dimensions of your entire survey site you can then multiply this up to get an estimate of the total number of a species present.

Detailed explanation-5: -Place a quadrat at 0m on the transect and count the number of daisies within the quadrat. Repeat step 2 six times moving the quadrat 5m further along the transect each time. At each location you may measure the light intensity, soil hydration or soil pH to determine if this factor affects the abundance of daisies.