What does it mean that DNA replication is
semi-conservative?

A. that the old DNA is destroyed and only the new copies are kept

B. that each strand contains segments of old and new DNA

C. that after replication one set
is destroyed and only the new set kept

D. that each set of DNA contains an original and a new strand

The phlogiston theory in the 17th century attempted to explain burning. the theory stated that combustable objects contained a material called phlogiston, a substance without mass, color, odor, etc. after objects burned, the objects were dephlogistonated and were then in their true form. the phlogiston theory was accepted until the 18th century, when lavoisier proved that combustion requires a gas that has mass. phlogiston is considered a) to be scientific knowledge b) not to be scientific knowledge c) to be proven by scientific method d) to be accepted in the modern scientific community

What is the name for a substance formed in a chemical reaction

Theories basic to all of the life sciences include the germ theory of disease. theory of evolution by natural selection. o two of these answers are correct none of these answers are correct o cell theory.