Ecologists sample a field using 10 quadrats, and and find the following number of dandelions in each:1, 4, 2, 2, 3, 4, 2, 5, 0, 1What is the mean number of dandelions per quadrat?

Estimate the dandelion population size for a field with an area 300 m² and a mean of 2.4 dandelion plants per 1 m² quadrat.

Q1. Students used quadrats to estimate the population of dandelion plants on a field. (a) Describe how quadrats should be used to estimate the number of dandelion plants in a field. ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ (4) (b) The field measured 40 m by 145 m. The students used 0.25 m 2quadrats. The students found a mean of 0.42 dandelions per quadrat. Estimate the population of dandelions on the field. ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ Estimated population of dandelions = ______________ (2) (c) In one area of the field there is a lot of grass growing in the same area as dandelions. Suggest why the dandelions may not grow well in this area. ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________

30 daisies are counted in 6 quadrats on lawn A. Calculate the mean number of daisies per quadrat.

Find the average of first five integral multiplies of 4.

Which piece of equipment can be used to estimate the population size of a given species in a defined area?CalculatorTransectQuadratTape measure2A student measures the number of snails in a garden by taking 10 random 1 m2 quadrat readings. If the numbers recorded are 3, 2, 1, 4, 2, 4, 5, 5, 2 and 2, what is the mean number of snails per m2 in the garden?302343A field measures 10 m by 30 m. In ten 1 m2 quadrats thrown randomly onto the field, an average of 5 flowers is counted. What is the estimated number of flowers on the whole field? 150050030001504What is a quadrat placed along a transect used to measure? The sizes of different species in a defined areaA change in species distribution along a set lineThe numbers of different species along a set lineThe estimated population of a single species in a defined area5Which of the following are abiotic factors that might affect the distribution of a species?TemperatureImmersion by waterAll of theseLight intensity