When dissolved in water acids make solutions that taste

Which statement correctly identifies the scientific question and describes why the question is scientific? question 1 refers to the supernatural.question 2 reflects a moral or social value.question 3 refers to something that can be measured.question 4 reflects a question that can’t be observed.

Which of the following describes a difference when gram-positive bacteria are compared to gram-negative bacteria?

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?