The correct answer is b. protein. Hope that helps!
Natural selection affects or changes a population and not only an individual organism because as there are somethings to be changed in a certain organism to adapt to the changes in the environment, all organisms in a certain species will be able to adapt and the changes therefore is collective.
Answer:
they carry out experiments to understand it
Explanation:
Scientists raise hypotheses which are tested by experiments made under controlled conditions in order to explain a particular topic. When a hypothesis is confirmed by the experimental data, the evidence obtained from this experiment provides the basis to increase the scientific knowledge about a particular issue. In consequence, experimentation can be considered as a critical step in the scientific method and research aims to advance knowledge of a particular phenomenon by confirming a hypothesis, which must be testable (i.e. verifiable as a result of further experimentations).
