Variation basics
What word means differences between individuals?
Variation.
We inherit our genes from whom?
Our parents.
Is human height continuous or discontinuous variation?
Continuous variation.
Name two differences you might see between humans.
Height, hair colour or facial features.
Is blood group determined by genes or the environment?
Genes.
Is sunflower stem length continuous or discontinuous variation?
Continuous variation.
Can individuals of the same species have different characteristics?
Yes. Individuals of the same species can have different characteristics.
Are scars caused by genes or environmental factors?
Environmental factors.
Which type of variation has distinct categories with no intermediate values?
Discontinuous variation.
A hawk has wings, but a lion does not. Is this variation within a species or between species?
Between species.
Name one environmental factor from the video that can affect height.
Diet / nutrition, or sleep.
Why is height an example of continuous variation?
Height can have any value within a range. Intermediate values are possible.
Two humans have different heights. Is this variation within a species or between species? Explain.
Within a species, because both individuals are humans.
A student says, "Only genes affect our height." What is missing from this explanation?
The environment also affects height, for example nutrition.
The video uses a bar chart for discontinuous variation. Why are there gaps between the bars?
The bars represent separate categories.