How many chambers does the heart contain?

Which phrase is the best summary of the model shown? a. the transfer of the sun's energy through trophic levels b. a series of aerobic and anaerobic reactions c. a transformation of light energy into chemical energy d. the breakdown of food molecules

Mrna decodes information from the original dna master plan to build proteins in the during the process of ribosomes.

Drag the tiles to the correct boxes to complete the pairs. match the nitrogenous base of dna with its complement.