The theory of evolution by natural selection, first formulated in Darwin's book "On the Origin of Species" in 1859, is the process by which organisms change over time as a result of changes in heritable physical or behavioral traits. Changes that allow an organism to better adapt to its environment will help it survive and have more offspring.
Evolution by natural selection is one of the best substantiated theories in the history of science, supported by evidence from a wide variety of scientific disciplines, including paleontology, geology, genetics and developmental biology.
The dose-response relationship is linear.
Explanation:
The study of the drugs are mainly done on the rats in the laboratory. The rats are the mammals and show quite specific and similar immune system as the human beings.
The toxic substances can be checked on the rats. The laboratory study shows that linear relationship between toxicity level and the concentration of the food. The result of this relationship can be shown in the form of the graph. The graph shows the dose-response relationship is linear.
Thus, the answer is dose-response relationship is linear.
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