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.

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?

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. ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________

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

A field planted to groundnut on an area of 90 x 60 m2 and spacing of about 30 x 15 cm2, calculate the plant population per hectare. 5400 plants/ha 222 222 plants/10 000ha 5400 plants/10 000ha 222 222 plants/ha

ind the area of the garden in square feet.Use the table of conversion facts, as needed.