Select the true statement.

rna is mostly single-stranded; dna is always double-stranded.
rna and dna usually have identical nitrogenous bases.
several types of dna regulate protein synthesis.

Which identifies the main purpose of biological taxonomy?

Animals have a variety of adaptations,including trachea and gills, which allow this key process to occur. which provides the molecules necessary for cellular respiration and efficient atp synthesis?

Record your answer from lab exercise #1, step 1, question 1.what time in hours: minutes: seconds gmt did the p waves arrive?