Which contribution to the body of scientific knowledge is most recent?
the development of the lever
the confirmation of the double-helix structure of dna
the discovery of electricity
the theory of evolution

Select the correct answer. which term do biologists use to describe the average number of individuals of a species per unit area? a. carrying capacity b. population density c. minimal viable population d. survivability curve

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.

Chloroplasts and bacteria are in size. a. similar b. at different ends of the size range c. exactly the same d. none of these