'Nuclear envelope reforms' diaporamas de présentation

How do organisms grow?

How do organisms grow?. How do organisms grow?. Paramecium 400x. Onion skin cells 400x. How do organisms grow?. How do organisms grow?. Living things grow by producing more cells. Cells will divide rather than growing larger.

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Chapter 8 Cell Reproduction

Chapter 8 Cell Reproduction. http://www.pisgahscience.com/bioonline/. Which of these pictures shows an organism with cell division taking place?. I. Introduction - Cell Division :. Occurs more often in young, growing organisms or when damaged tissue is repaired.

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The Basics of Mitosis & Meiosis

The Basics of Mitosis & Meiosis. GUTS Lecture James P. Evans MD, Ph.D Fall 2008. Objectives. Understand the process of somatic cell division: mitosis -> daughter cells germ cell division: meiosis -> gametes The consequences of these processes and resulting errors. What is Mitosis?.

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Cells

Cells. I. Cell Structure and Function A. Cell Theory 1. A cell is the basic structural and functional unit of living organisms 2. All cells come from pre-existing cells 3. The activity of an organism depends on both the individual and the collective activities of its cells. Cells.

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Chapter 10 Cell Growth and Division

Chapter 10 Cell Growth and Division. Cell Growth. A. A living thing grows because it produces more and more cells. 1. The cells of a human adult are no larger than the cells of a human baby, but there are more of them.

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Lecture 2

Lecture 2. Cell Structure, Mitosis and Meiosis. Study Questions - Lecture 2. Describe the major components of a typical animal cell and their function(s). What is the cell cycle? At which stage is the genetic material replicated? What events take place at each phase?

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Chapter 10 Cell Growth and Division

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Meiosis

Meiosis. Honors Biology Spring 2013. Warm-Up. With a neighbor, discuss the following: What is meiosis? How does it differ from mitosis?. Essential Questions. What is meiosis and why is it necessary? What are the stages of meiosis? How does meiosis compare to mitosis?.

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Announcements

Announcements. Part of Lab in Brooks 101 computer lab next week Bring FlyLab and computer disc (available in bookstore) Change in syllabus: exams are on Th. (9-9pm) and Fri. (9-5pm) Read chapters 2, 3 carefully

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Cell Growth and Division

Cell Growth and Division. Chapter 10. Why do cells divide? . As the cell grows the DNA has an increased work load. As the cell gets bigger the DNA has to work harder to control the cell As the cell grows the exchange of materials through the cell membrane becomes limited

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Cell Life Cycle

Cell Life Cycle. Cells have two major periods Interphase Cell grows Cell carries on metabolic processes Cell division Cell replicates itself Function is to produce more cells for growth and repair processes. DNA Replication.

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Unit Test: Cells Study Guide Part 2

Unit Test: Cells Study Guide Part 2. 1. What are the two main reasons why cells divide instead of continuing to grow?. As a cell grows, it used information in DNA; eventually the cell will use all of the information, so it must divide.

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Cell Life Cycle

Cell Life Cycle. Cells have two major periods Interphase Cell grows Cell carries on metabolic processes Cell division Cell replicates itself Function is to produce more cells for growth and repair processes. DNA Replication.

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Class Objectives:

Class Objectives:. ? Distinguish between haploid and diploid cells and its relation to meiosis and fertilization. ?D istinguish the various phases of meiosis due to the position of the chromosomes at that particular phase.

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The cell cycle and mitosis

The cell cycle and mitosis. Cells constantly reproduce exact duplicates of themselves. Why? Replacement Repair Growth. Cells must make an exact copy of their DNA DNA is the blueprint of the cell and is found in the nucleus.

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Mitosis

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Prophase

Prophase. 2. METAPHASE. Chromosomes line up along the midline of the cell. 3. ANAPHASE. Spindle fibers shorten and pull chromosomes. Chromosomes separate into chromatids . Chromatids move towards the poles. 4. TELOPHASE. Chromosomes begin to uncoil.

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Cell Cycle

Cell Cycle . The repeating set of events in the life of a cell. Includes Interphase 3 phases Cell Division Mitosis Cytokinesis . Interphase. Period between cell divisions, 3 stages- 1. G 1 phase- Gap 1- Cells grow to mature size. 2. S phase- Synthesis - DNA replication.

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Josh Wood Cell Division

Josh Wood Cell Division. Stage 1: Interphase. Before a cell can enter cell division, it needs to prepare itself by Replicating its genetic information and all of the organelles. All of the preparations are done during the interphase. Stage 2:Mitosis: prophase.

147 views • 8 slides