WRITE ABOUT A THEME: ORGANIZATION Cells arc the basic units of structure and function in all organisms. A key feature in the life cycle of plants is the alternation of multicellular haploid and diploid generations. Imagine a lineage of flowering plants in which mitotic cell division did not occur between the events of meiosis and fertilization (se Figure 30.12). In a Short essay (lOO-150 words), describe how this change in the timing of cell division would affect the structure and lifecycle of plants in this lincagc.
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- VISUALIZE Sketch a roughly cuboidal cell preparing to divide. Indicate the orientation of the preprophase band and the site where the new cell walls of the daughter cells will form.arrow_forwardDirection: Use the table below to answer the questions aboutmitosis.Growth Rate of Rapidly Dividing Human Liver CellTime (hours) Number of cells0 110 220 430 840 1650 32 1. If no cells die, how many cells will there be in one week?2. If the original cell is diploid and divides mitotically, howmany copies of each chromosome will there be in 60 hours?arrow_forwardDouble fertilization in flowering plants occurs when one sperm cell fuses with an egg to form a diploid cell, the ______, and a second sperm fuses with the two nucleiof the central cell of the female gametophyte. This triploid cell will divide mitotically to form a food-storage tissue called the_______ . This food is transferred to the developing plant embryo by structures called_______ .arrow_forward
- no need to explain just need to know if its a,b,c or d 1.) The life cycles of some plants contains two alternating generations of adults. The diploid adult is called the sporophyte generation and the haploid adult is the gametophyte generation. The diploid plants of the sporophyte generations produce spores by the process of: a.) amitosis b.) meiosis c.) mitosis d.) binary fission 2.) A scientist was examining a human cell with 22 pairs of autosomes, an X chromosome and a Y chromosome. What conclusions can we drawn about the cell? a.) It is a somatic, diploid and male cell. b.) It is a somatic, diploid and female cell. c.) It is a gametic, haploid and male cell. d.) It is a gametic, diploid and male cell. 3.) What will be the number of chromosomes in Turner’s syndrome and Klinefelter's syndrome of an organism whose haploid number is 20? a.) 39 in Turner’s syndrome and 41 in Klinefelter’s syndrome b.) 41 in Turner’s syndrome and 39 in Klinefelter’s syndrome c.) 19 in Turner’s…arrow_forwardAnimals and plants both have diploid and haploid cells. How does the animal life cycle differ from the alternation of generations exhibited by plants?arrow_forwardDirections: Complete the illustrations that show the differences between mitosis and meiosis. Consider the two-winged fly species Cricotopus sylvestris with chromosome number 2n = 4. Draw the stages (prophase, metaphase, anaphase and telophase with cytokinesis) of the two cell divisions in the corresponding boxes of Table 1. No need to include prometaphase. One box is to one stage. For each stage, draw clearly the appearance and configuration of the cell(s) and the chromosomes. For better illustration, draw the chromosomes with different sizes Use one color for the chromosomes in mitosis and two colors for the chromosomes in meiosis For the description of each stage, include the following: complete name of the stage (include correct number for those that need to have one) unique and important events undergone by the cell(s) and chromosomes appearance and configuration of the chromosomes (thinness or thickness, double-stranded or single-stranded, etc.) number of chromosomes in each…arrow_forward
- Directions: Complete the illustrations that show the differences between mitosis and meiosis. Consider the two-winged fly species Cricotopus sylvestris with chromosome number 2n = 4. Draw the stages (prophase, metaphase, anaphase and telophase with cytokinesis) of the two cell divisions in the corresponding boxes of Table 1. No need to include prometaphase. One box is to one stage. For each stage, draw clearly the appearance and configuration of the cell(s) and the chromosomes. Inspect and refer to slides 10 to 11 of the Cell Division PPT for mitosis and slides 14 and 17 for meiosis. Make sure that when the pictures are zoomed in, they will still be clear. For better illustration, draw the chromosomes with different sizes (inspect and refer to slides 10 to 11 of the Cell Division PPT for mitosis and slides 14 and 17 for meiosis). Use one color for the chromosomes in mitosis and two colors for the chromosomes in meiosis (see slides 10 to 11 of the Cell Division PPT for mitosis and…arrow_forwardConifer Life Cycle The conifer plant has 18 chromosomes. For each of the four stages on the diagram of the conifer life cycle, labelled A-D, identify whether the stage is haploid or diploid, and indicate the number of chromosomes that would be found in the cells at each stage. Stage Haploid or Diploid? Number of chromosomes found in cells? A B C Darrow_forwardA diploid plant cell contains 54 chromosomes (2n=54). Describe the number arrangements of chromosomes in each of the following: a.A leaf cell immediately following cytokinesis b.A gametophyte cell at the conclusion of the S phase of mitosisarrow_forward
- In accordance to mitosis and meiosis, compare and contrast the processes in plants vs in animals. Create a venn diagram.arrow_forwardTask: Show your work/explain your reasoning as much as possible. If a certain species has a DNA content of 12 picograms in each diploid cell's nucleus when the cell in in G1 of the cell cycle, what would be the expected DNA content (in picograms) of a triploid cell (from the same species) in mitotic prophase? Consider ploidy changes and/or chromosome form changes, if applicable, when explaining your reasoning.arrow_forwardMitotic Cell division occurs in dogs, potato, zebra, and parrots cells. Which character will be absent in potato plants but present in dogs, zebra, and parrots cells? a. Root apical meristems are present where mitosis occurs. b. The resulting cells will contain exact numbers of chromosomes comparing parental cells. c. Star shaped Aster formation occurs around centrioles. d. Cell plate formation occurs.arrow_forward
- Biology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage LearningBiology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage Learning