Once the pattern found after one round of replication was observed, meselson and stahl could be confident of which of the following conclusions? a) replication is semi-conservative. b) replication is not dispersive. c) replication is not semi-conservative. d) replication is not conservative. e) replication is neither dispersive nor conservative.

Hydrilla (hydrilla verticillata) is an invasive aquatic plant and one of the most serious aquatic pests in florida. hydrilla has already been introduced to hundreds of bodies of water throughout florida, hydrilla is difficult to control because it grows rapidly and survives in many different water depths and conditions. hydrilla • describe how hydrilla affects native plant and animal species. include both a biotic and an abiotic limiting factor. • suggest one biotic and one abiotic recommendation that could slow the spread of hydrilla