Which of the following about Dalton's theory of matter is true? A Atoms of the same element have the same mass.

B Compounds formed from two elements will not always have the same proportions.

C Atoms cannot be divided into smaller parts.

Adoctor is trying to diagnose a patient with dry skin. which of the following resources would be the most ? a magazine ad about soft skin a growth chart online articles about dry skin medical books

How is ribosomal rna useful as a molecular clock? a. a large portion of the dna ring is not vital to structure or function, allowing it to accumulate neutral mutations. b. its rate of mutation increases over time as organisms continue to evolve and differentiate from each other. c. a slow mutation rate makes it useful for determining evolutionary relationships between ancient species. d. it is only found in select organisms, making it easier to compare relationships between species that have it.

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes