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During convection, less dense fluid rises and denser fluid sinks.

Which of the following is a true statement? question 8 options: populations can't evolve, only individual organisms. individuals have adaptations that can change over time. individuals have traits that may or may not make them successful at reproduction. individuals evolve to have adaptations.

Which of these is one of the nitrogenous bases in dna? a. proline b. leucine c. glycine d. thymine