Which of these is a difference between a dna and an rna molecule? which of these is a difference between a dna and an rna molecule? dna contains nitrogenous bases, whereas rna contains phosphate groups. dna is a polymer composed of nucleotides, whereas rna is a polymer composed of nucleic acids. dna contains five-carbon sugars, whereas rna contains six-carbon sugars. dna is usually double-stranded, whereas rna is usually single-stranded. dna contains uracil, whereas rna contains thymine?

What are charcteristics of lithosphere?

Which of the following can be reduced by the use of renewable energy sources? a. social costs b. economic costs c. environmental costs d. all of the above select the best answer from the choices provided a b c d

Which of the following statements is correct in hour our immune system responds to a potential pathogen? a. the adapted immune system will call on the innate immune system to destroy the pathogen. b. b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c. the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. d. the t-cells in the adapted immune systems are the first to recognize the pathogen vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a. antigen, antibody b. antibody, antigen c. antibody, antibiotic d. antibiotic, antibody