VISUAL SKILLS The light micrograph shows dividing cells nearthe tip of an onion root. Identify a cell in each of the followingstages: prophase, prometaphase, metaphase, anaphase, andtelophase. Describe the major events occurring at each stage.

1. Which type of cell division (mitosis or meiosis) results in: O Cells Haploid cells Diploid cells Cells with identical genetic composition Cells with half the chromosome number of the parent cell 2. Write the phase of mitosis that matches each phrase: Cells Nuclear envelope disappears Chromosomes are first visible Nuclear envelope reforms Chromosomes move towards opposite poles of the cell Spindle fibers appear Cytoplasm divides Sister chromatids line up along equator of the cell Mitosis or Meiosis Phase of Mitosis Explain why the whitefish blastula and onion root tips are selected for a study of mitosis

Pick an organelle or cellular structure that is unique to plants. Explain why this would be necessary for plant survival AND why it isn't necessary in animal cells. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). B I U S Paragraph Arial 10pt A V x X, P QUESTION 21 Double fertilization involves 2 fertilizations, write the cells/nuclei involved with each, their ploidy level (ie. n, n+n, 2n, 3n). with a ploidy level of with a ploidy level of Fertilization 1: ,with a ploidy level of with a ploidy level of with a ploidy level of Fertilization 2: with a ploidy level of

Draw a cell in meotic metaphae 1-label the mitotic center, centrioles,polar microtubules, and kinetochore microtubules.