What volume of hydrogen will be produced at stp by the reaction of 67. 3 g of tin with excess water according to the following reaction?.

The chart below matches messenger rna codons with amino acids. a dna strand has the sequence of bases, aat. according to the chart, the corresponding messenger rna codes for which amino acid?

The graph shows the populations of two species over time. which type of symbiotic relationship does the graph represent? a. commensal b. mutualistic c. parasitic d. parent-offspring e. predator-prey

Scientists observed a rock stratum with fossil. if mollusks evolved before arthropod, where will their fossils be found.