1. High level disinfectants should be used A. For hand hygiene
B. On metal instruments before heat sterilization
C. According to manufacturer's directions
D. On environmental surfaces

Dna replication occurs in preparation for

During crossing-over, a. genetic material is exchanged between nonsister chromatids, resulting in new combinations of alleles. b. nonsister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. c. one homologous chromosome of a tetrad is exchanged with another tetrad, resulting in new combinations of alleles. d. sister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. e. genetic material is exchanged between sister chromatids, resulting in new combinations of alleles.

Does all the energy stored by the phytoplankton reach the top level of the pyramid