When an atom varies in its number of neutrons but not its protons it is called an isotope
every other plant except for milkweeds.
16. In plant cells, cytokinesis is completed by the formation of a(n) cell plate.
17. In which of the following cases would asexual reproduction be most advantageous for an organism?
Living in a stable environment with little variation
18. If a cell is exposed to a chemical that inhibits the production of spindle fibers as the cell is preparing for mitosis, what would MOST likely happen?
The cell would not divide
19. Which of the following statements lists the steps that occur in the Cell Cycle, in chronological order?
Sister chromatids align in the middle; cytoplasm pinches in to separate daughter cells
20. What is the BEST description of DFTD?
an infectious, cell-cycle disease
21. The disruption of which cell function leads to gene mutations that result in cancer?
DNA replication
22. During the time of normal cell activity, DNA exists in a loose, spaghetti-like form called _chromatin_.
23. The table below identifies three classes of genes that affect the cell cycle.
Proto-oncogenes become oncogenes.
