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19. How is a cleavage furrow formed during cytokinesis in an animal cell? 20. How is a cell plate formed during cytokinesis in a plant cell? What forms the new sections of the plasma membranes in a dividing plant cell? Be able to look at a picture of a cell at different stages of the cell cycle and identify the stage as we practiced in class. Meiosis and Sexual Reproduction 21. What are the costs and benefits of sexual versus asexual reproduction, based on the list you made during class? 22. Asexual reproduction results in identical offspring unless which of the following occurs? a. Natural selection b. Cloning c. Crossing over d. Mutation e. Environmental change 23. Define diploid and haploid. Will meiosis necessarily lead to formation of haploid gametes?