We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you!
Presentation is loading. Please wait.
Published byAisha Cressey
Modified about 1 year ago
Cell Growth and Division
Cell Growth Living things grow chiefly because of two things. 1. The number of cells increases.
2. The size of each individual cell increases. Number 1 is actually due to number 2!
Volume vs. Area The volume, the growth of the internal parts of the cell surpasses that of the area, or external parts of the cell.
Limits The growth is limited by two things The instructions, DNA. The amount of available materials.
Cell division The point at which the internal exceeds the external = division. Parent Daughter 1 Daughter 2
Rate of growth In ideal conditions, E- coli can double its volume in just 30 minutes. In one day a single bacteria could produce a 14 Kg mass.
In three days the mass of the bacteria would equal that of the…
Disorderly growth Cancer: a disorder in which cells have lost the ability to control their rate of growth. P D1 D2 D3 D2 D3 D1 D2 D3 D2 D3
Cell Division There are two main stages to division of Eukaryotic cells. Mitosis Cytokinesis
Mitosis The nucleus of the parent cell is divided into 2. Each with the same number and type of chromosomes.
Cytokinesis The cytoplasm of the parent cell divides. Two distinct cells are formed. Daughter cells
Chromosomes Highly organized segments of genetic information. Made up of chromatin.
Chromatin A specific combination of DNA and proteins.
Chromatids Each chromosome has two identical parts, chromatids. Joined by a centromere.
The two identical parts allow for the production of two identical cells.
The process of cell growth and division is a cycle. Mitosis Cytokinesis Interphase
Mitosis Cytokinesis Interphase
The period between cell divisions 3 phases G1, S, and G2
1.G1: Cell growth 2.S: DNA replication 3.G2: Preparation for mitosis
Mitosis (4 phases) 1.Prophase 2.Metaphase 3.Anaphase 4.Telophase
Prophase(fig 8-12) Longest phase Centrioles take positions at opposite ends of the cell
Spindle fibers form between the centrioles Chromosomes attach to the spindle
The nucleolus disappears The nuclear envelope breaks down.
Metaphase(fig 8-14) Shortest phase Chromosomes line up along the center of the cell.
Anaphase (fig 8-15) Centromeres split Individual chromatids are pulled to opposite ends of the cell.
Telophase (fig 8-16) Final phase Chromatids uncoil to reveal a mass of chromatin.
Nuclear envelopes reform around the chromatin A nucleolus becomes visible for each daughter cell
Cytokinesis Animal Cells The cell membrane moves inward pinching the cytoplasm into two cells.
Each half contains a nucleus And all necessary organelles Plant Cells A cell plate forms dividing the cell in half
The cell plate evolves into a new cell wall for each cell.
Scientific Notation M X 10 n A.1.) 1.0 X cm A.2.) 1.0 X cm B.1.) cm B.2.) 1,000,000 times greater
Mitosis and Cytokinesis B-2.6 Summarize the characteristics of the cell cycle: interphase (called G1, S, G2); the phases of mitosis (called prophase, metaphase,
Cell Cycle IPMATC. Cell Cycle 3 Parts: – Interphase – Mitosis Prophase Metaphase Anaphase Telophase – Cytokinesis.
Cell Growth and Division Honors Biology Chapter 10.
The Cell Cycle. Chromosomes Carry genetic information in eukaryotes Carry genetic information in eukaryotes Made of DNA and proteins Made of DNA and proteins.
Section 10-2 Cell Division Biology I Flora. Two Parts of Cell Division (1) Mitosis – division of the cell nucleus (2) Cytokinesis – Division of the cytoplasm.
Cell Division. Two Parts of Cell Division (1) Mitosis – (2) Cytokinesis.
Cell Growth and Division Mitosis and Meiosis. Cell Growth When an organism grows, the number of cells increase but the size of each cell remains small.
Cell Division Mitosis Chapter 10. Why do cells divide, rather than continually grow forever? The larger a cell becomes, the more demands the cell places.
Cell Growth and Reproduction. Limitations on Cell Size Diffusion Larger the cell, the longer it takes to get nutrients from outside the cell through diffusion.
Cell Cycle: M Phase Mitosis and Cytokinesis. Cell Division (M phase) Occurs in two stages – Mitosis (nuclear division) – Cytokinesis (cytoplasmic division)
The cell cycle and mitosis. Cells constantly reproduce exact duplicates of themselves. Why? Replacement Repair Growth.
Phases of Cell Division Interphase (stage between cell division) Interphase (stage between cell division) Prophase Prophase Metaphase Metaphase Anaphase.
Cell Cycle and Mitosis. The Cell Cycle: life of a cell from first formation (from a dividing parent cell) to its own division into 2 cells. Before a.
End Show Slide 1 of 38 Copyright Pearson Prentice Hall Prentice Hall Biology.
N-6 Cell Division What do cells spend their time doing? Why do they do this?
CELLS AND HEREDITY. Introduction November 30, 2010 New Vocabulary List – back of spiral –Title of new list – Heredity –DNA -- a molecule found in cells.
The Cell Cycle Mitosis. The Cell Cycle The regular sequence of growth and division that cells undergo.
End Show Slide 1 of 38 Copyright Pearson Prentice Hall 10-2 Cell Division.
Cell Reproduction Prokaryotes Bacteria Eukaryotes Plants & animals copyright cmassengale.
Cell Cycle Vocabulary and Notes Biology. Centrioles – one of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope. Chromatid.
Cell Division and Mitosis -Chapter 9- Honors Biology Program Mountain Pointe High School.
Mitosis & Cytokinesis Cell Growth and Reproduction Ch. 8.2.
Cell Division The Cell Cycle: Interphase Mitosis Cytokinesis.
Cell Cycle Cell Growth and Division. 2. Why do cells divide? If the cell is too big: If the cell is too big: Too much demand is placed DNA Too much demand.
I.Sexual Reproduction --two parents combine. 1. The sex cell from the male parent is sperm. a. Sperm head is almost all nucleus (genetic info) 2. The.
Cell Growth & Division Question: Why do cells divide? Cell Growth & Division Question: Why do cells divide?
SC.912.L Compare and contrast mitosis and meiosis and relate to the processes of sexual and asexual reproduction and their consequences for genetic.
Cellular Reproduction. Cellular Growth Cells grow until they reach their size limit, then they either stop growing or divide. A cells size is limited.
Lecture 2 Cell Structure, Mitosis and Meiosis. Study Questions - Lecture 2 1)Describe the major components of a typical animal cell and their function(s).
Cellular Reproduction. Mitosi s I – Interphase: Period between division DNA molecules duplicate Single strands (chromatin threads) X shaped chromosomes.
© 2016 SlidePlayer.com Inc. All rights reserved.