Which two characteristics show variation as a result of environmental factors only?

For which type of variation can a measurement have any numerical value?

For which type of variation are differences grouped into categories?

If you were to investigate the height of everyone in your class, what type of data would you be gathering?

If you were to investigate the eye colour of everyone in your class, what type of data would you be gathering?

Which three features show discontinuous variation?

Which Two features show continuous variation?

Features with continuous variation have a normal distribution curve, which is shown by the bars on the graph. What shape do the bars form when there is normal distribution?