You measure the overall growth of a population of tumor cells and find it to be at a rate of 6 units per day. The rate of cell apoptosis is 4 units per day. The rate of cell division in this population of tumor cells is therefore units per day. These tumor cells are likely to be .

To maintain asepsis when administering an injection, all parts of the syringe can be handled except the:

Which of these parts of the membrane large moecules pass through it ?

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.