Distribution and biodiversity (practical)

How should a field be set up for random sampling?

• Divide the field into a grid and select random grid squares.

• Choose samples from the edges of the field.

• Select samples from the center of the field only.

• Use a fixed pattern to select samples.

How should a field be set up for random sampling?

• By laying two tape measures at right angles on the field to set up a coordinate system.

• By placing markers randomly across the field.

• By drawing a grid on a map of the field.

• By using a GPS device to mark random points.

How should students decide where the quadrats are placed?

• Randomly select locations

• Place them in a straight line

• Choose areas with the most sunlight

• Place them near water sources

How should students decide where the quadrats are placed?

• By using a random-number generation to produce coordinates.

• By placing them at equal intervals.

• By choosing locations based on visual inspection.

• By placing them near the edges of the study area.

What is the formula for estimating population size?

• (Number of marked individuals × Total number of individuals) / Number of recaptured marked individuals

• (Total number of individuals × Number of recaptured marked individuals) / Number of marked individuals

• (Number of recaptured marked individuals × Number of marked individuals) / Total number of individuals

• (Number of marked individuals + Total number of individuals) / Number of recaptured marked individuals

What is the formula for estimating population size?

• (Total area / area of quadrat) × mean number of individuals counted per quadrat

• (Total area × area of quadrat) + mean number of individuals counted per quadrat

• (Total area - area of quadrat) / mean number of individuals counted per quadrat

• (Total area + area of quadrat) × mean number of individuals counted per quadrat

State the controlled variables of this practical.

• Size of quadrat

• Coordinate system

• Number of quadrats per site

• Area of sites

Why does a random number generator need to be used?

• To ensure fairness in selection processes

• To increase the speed of calculations

• To reduce the cost of operations

• To simplify complex algorithms

Why does a random number generator need to be used?

• To ensure data accuracy

• To avoid bias in random sampling

• To increase sample size

• To reduce data redundancy

What is a safety precaution to take when handling certain plants in a practical?

• Wear gloves and wash hands after the practical.

• Use a face mask and goggles.

• Keep plants in a sealed container.

• Avoid touching the plants entirely.