Hypothesis are testable meaning you are able to preform an experiment to see the relationship between two variables.
I believe the answer you're looking for is Archaea-bacteria.
Answer:
Those organisms survive and maintain its population who are chosen by natural selection.
Explanation:
This statement means that when the population experiences a new set of environmental conditions, two things are happened i. e. the population either adjusts through natural selection or becomes extinct. The fossil of dinosaur indicates that extinction occur due to changed in the environment. If the population made changes in itself and adapt the environment then the organism survive otherwise extinction occur.
The answer to this is : B, Their roots.
