A timeline of important discoveries about DNA is shown below. These discoveries have
contributed to our current knowledge about DNA.
1669
DNA is discovered.
1919
Base, sugar, and phosphate
structure is identified.
1944
1950
DNA identified as basis
of heredity.
Rules of nucleotide base
pairing established.
X-ray diffraction captures
DNA images
DNA structure is determined
1951
1953
Which statement best summarizes the development of knowledge of DNA over time?
Ideas about DNA have remained unchanged over time.
Scientists gained more knowledge about DNA as new evidence became available.
Changes in ideas about DNA are based on opinion.
Past knowledge of DNA was discarded as each new discovery was made.

An experiment is designed to test the relationship between the initial height of a basketball before it is dropped to the height of its rebound bounce. the height of the rebound bounce is measured using a scale positioned behind the ball. in the above experiment, which condition would not be controlled? a). the starting height of the ballb). the surface the ball bounces on c). the type of ball d). the method to measure the rebound height of the ball

The coulomb's law explains which of the following? select all the force between two charged objects is inversely proportional to the charge on each object. the force between two charged objects is directly proportional to the charge on each object. the force between two charged objects is directly proportional to the distance separating them. the force between two charged objects is inversely proportional to the square of the distance separat coulomb's law is similar to newton's 2nd law. if the force between two objects is f and the charge on both objects is doubled, the new force between the would now be 2f. if the force between two objects is 2f and the distance separating them is doubled, the new force between the objects would now o the be zf.

What is the name for the remnant of an asymptotic giant that has lost its shells? black dwarf white dwarf yellow giant black hole