Variation which is categorical (divided into particular categories).

A graph displaying categorical data plotted as columns of equal width that do not touch. The height of each column represents the tally or frequency for the category (how many times it was observed).

Related to the genetic material (DNA) and genes that an individual has.

Discontinuous variation: data handling and analysis

Science

Reproduction and variation

Variation within species

Continuous and discontinuous variation: practical

Continuous variation: data handling and analysis

Pupils will learn that variation between individuals of the same species means some individuals are better adapted to compete, which can lead to natural selection and cause the heritable characteristics of a species to change (evolve) over generations.

Pupils learned that organisms can be identified and classified into hierarchical groups based upon similarities and differences in their characteristics at the macroscopic and cellular levels.

This unit examines variation within species, both continuous and discontinuous, using measurements and graphical representations. It also emphasises objectivity, accuracy, precision, and repeatability in investigations, the use of appropriate techniques, and the effective presentation of data.

Variation (differences within species)

Blood type and earlobe attachment are examples of {{}} variation.

Which of these factors causes discontinuous variation between organisms?

it shows measurements of discontinuous variation

Which statements about the bar chart are true?

Eye colour is genetic, but there many variations of colours. How many genes must control this feature?

In the image, which earlobes are attached?

On which axis of a graph should you plot the independent variable?

On which axis of a graph should you plot the dependent variable?

It’s a different way of showing the data.

It tends to show trends and patterns more clearly.

A table tends to show trends and patterns clearly.

Why is it often valuable to plot data as a graph?

Discontinuous variation: data handling and analysis

Lesson outcome