Which statement below best summarizes the role of the dna molecule in cells?
a) guides cell division
b) protects cells from infection
c) provides the instructions for making proteins
d) regulates the chemical processes that provide the cell with energy

What are some natural processes that represent physical and chemical changes?

Blood stem cells may develop into any kind of human blood cells. what kind of stem cells are blood stem cells? a. multipotent stem cells o b. totipotent stem cells o c. pluripotent stem cells o d. unipotent stem cells

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes