B11.4 Variation and Selection

What is variation?

• Differences within a species

• Differences between two or more species

• Similarities between two or more species

• Similarities within a species

Which type of variation refers to the differences between the DNA of two individuals?

• Genetic

• Phenotypic

• Continuous

• Discontinuous

Height is an example of...

• Genetic variation

• Phenotypic variation

• Continuous variation

• Discontinuous variation

One person has blue eyes, the other has brown. What types of variation are they displaying?

• Continuous

• Discontinuous

• Genotypic

• Phenotypic

True or false: genetic variation can be invisible?

• True

• False

When graphed, continuous variation data usually forms the shape of a [?]

In continuous variation, the greatest number of people are in the mid-range, and fewer people are found at the [?]

What are the principles of natural selection?

• Variation

• Competition

• Adaptation

• Selection

• Survival

Over many generations, natural selection causes groups of organisms to become [?] to their environment

What is MRSA?

• An antibiotic that bacteria are resistant to

• A strain of bacteria that are resistant to an antibiotic

• An infection caught in hospital

• A disease that can be treated by antibiotics