Which of the following terms best describes the study of genes during the 1900s? A. predictable
B. guarded
C. progressive
stagnant

The circles, or orbits, for electrons are called energy levels. each level can hold only a certain number of electrons. add electrons to each level until you can't add any more. how many electrons can each level hold?

Each pair of clay balls represents two planetesimals. if each planetesimal is composed of the same material and is separated he the same distance, which pair experiences the frayed gravitational attraction?

What macromolecule is produced during translation? a. carbohydrate b. rna c. dna d. protein