Which best summarizes the scientific process that led to our current understanding of DNA? Each scientist made an important, but unrelated, contribution.
Scientists built on the previous work of other scientists to make new discoveries.
Most of the discoveries were made by chance and did not depend on prior knowledge.
The most important contributions were made within the same time period of the late 1800s.

Scientists built on the previous work of other scientists to make new discoveries.

Explanation:

Scientists built on the previous work of other scientists to make new discoveries.

Explanation:

Meep ^w^

convalent bond :

is a chemical bond formed by the sharing of electron between 2 atoms.

it is the direct chemical bond between 2 atoms.

in bond formation atoms are involved here.

electrovalent bond:

is a chemical bond defined as electroststic attraction between 2 atoms.

it is the electrostatic attraction between 2 atoms.

in bond formation, ions are involved here.

hope it

and ur welcm

: )

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e