The earth is made up of 75% water. Sources such as oceans, lakes, and rivers have an important role in keeping earths surface insulated and warm. What property of water provides this protection

Use the drop-down menu to complete the statement. an electron in the first energy level of the electron cloud has an electron in the third energy level.a. a lower energy thanb. a higher energy thanc. the same energy as

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?

Why do some dna fragments move farther than others during gel electrophoresis? a. because their shapes are different b. because they are different types of molecules c. because the samples are different colors d. because their masses are different