Answer:
1. Skin Creams
Explanation:
An independent variable is the only variable that is changed while the rest is kept the same. In this setup, the doctor is using different creams on the same patient with the same skin condition so the independent variable is the skin cream and not the skin condition.
Answer:
Carbon dioxide, methane, and water vapour are the most important greenhouse gases.
The finch population on each island was unique. (correct statement) This is due to evolution, the finches beak size is a good example as the nuts on each island were different and the larger/smaller a beak was, it represented a change in the finch population so that they could break open the nuts easier.
