• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Solar Energy - Photovoltaics
Solar Energy - Photovoltaics

... • To induce the built-in electric field within a PV cell, two layers of different semiconductor materials are placed in contact with one another. • The conductivity of semiconductor increases with temperature and in the presence of impurities. • The addition of these impurities is called doping. • I ...
Plasma Membrane
Plasma Membrane

... Biology Chapter 7 Cells Section 7.2: Plasma Membrane ...
Sample Biology EOCT Questions
Sample Biology EOCT Questions

... attracts insects that aid in pollination. prevents germination within the seed pod. can cause genetic changes to occur. ...
Contents: The Journal of Cell Biology
Contents: The Journal of Cell Biology

... mRNA-containing lumens which stain blue. There are four columns of myofibrils (white areas) per cell which separate the lumens from each other and from the cell membrane. See related article by Becker et al., pages ...
The Cell Cycle
The Cell Cycle

... Cell Growth and Cell Division are carefully controlled Not all cells move through the cell cycle at the same rate ...
Tour de Cell
Tour de Cell

... Diagram of Cells The Zebra is made of trillions of cells that work together. Therefore the Zebra is a good example of a Multicellular Organism. ...
File
File

... 26. Which type of cells would have more mitochondria & why? 27. ___________ like glucose are burned in the mitochondria to release cellular energy known as __________. 28. What surrounds the outside of all cells? 29. In plant cells, a cell __________ surrounds the cell membrane for extra support. 30 ...
Structure and Function of the Cell
Structure and Function of the Cell

... nutrients, water, oxygen into the cell and waste and CO2 out of the cell ◦ Have carbohydrate chains which are chemical recognition sites and interact with each other ...
THE CELL - TeacherWeb
THE CELL - TeacherWeb

... Using his handcrafted microscopes he was the first to observe and describe single celled organisms, which he originally referred to as animalcules, and which we now refer to as microorganisms. He was also the first to record microscopic observations of muscle fibers, bacteria, spermatozoa and blood ...
Notes guide 2-3 Plant and Animal Cells 1. The two main types of
Notes guide 2-3 Plant and Animal Cells 1. The two main types of

... 6. Unlike plant cells, animal cells have no ___________________ or _______________. 7. ______________ are located near the _______________ of a cell. It comes in _________________________ and it helps the cell _________________. 8. What are some examples of animal cells? ...
Cells
Cells

... Cells must acquire necessary materials, such as food molecules, from outside the cell. ...
Cell Structure and Function
Cell Structure and Function

... Cell Structure and Function ...
Cytology
Cytology

... membrane. It contains the organelles and fluid.  The organelles are tiny structures in the cytoplasm which perform various jobs for the cell.  The fluid part of the cytoplasm is called the cytosol.  Cell : the basic unit of structure and function in living organisms  Nucleoplasm : is the area of ...
Comparing Plant and Animal Cells Part 1: Anacaris Reminders!!
Comparing Plant and Animal Cells Part 1: Anacaris Reminders!!

... 2. Use a toothpick to gently remove some cheek cells from inside your mouth (teacher will demonstrate) 3. Roll the toothpick through 1-2 drops of water on the slide 4. Add a drop of methylene blue on a slide 5. Immediately throw out the toothpick 6. Add the cover slip and observe under low, medium, ...
Biological characterization and in vitro culture of human
Biological characterization and in vitro culture of human

... Tel: +39 06 4976 /6804  e‐mail: [email protected]  ...
PowerPoint
PowerPoint

... Vacuole • Storage of water, starch, fats, etc. ...
File
File

... Cancer cells do not perform specialized functions by the body. For example, if there is cancer in the lungs, they will not exchange oxygen and carbon dioxide. Cancer cells come from normal cells that have suffered damage to the genes that help make proteins involved in cell cycle regulation. There c ...
Mitosis - KS Blogs
Mitosis - KS Blogs

...  S phase – chromosome replication (S = synthesis = “to make”)  G2 phase – molecules and organelles required for cell division produced ...
Clonetics™ Bronchial Smooth Muscle Cell Systems
Clonetics™ Bronchial Smooth Muscle Cell Systems

... followed. The performance of cells is not guaranteed if any modifications are made to the complete Cell System. Cryopreserved BSMC and DBSMC are assured to be viable and functional when thawed and maintained properly. THESE PRODUCTS ARE FOR RESEARCH USE ONLY. Not approved for human or veterinary use ...
“Reversed” Krebs Cycle Can Feed Tumors
“Reversed” Krebs Cycle Can Feed Tumors

... of pediatrics at UT Southwestern, and colleagues at Northwestern University and the National Cancer Institute set out to study how these precursors were made in a subset of cancer cells that have mutations preventing them from using the normal oxidative pathway of the Krebs cycle. In a study publish ...
owen intro to bio - Kowenscience.com
owen intro to bio - Kowenscience.com

... communities classified by the predominant vegetation types distinctive combination of plants and animals  Biosphere: planet earth ...
Cells
Cells

...  Eukaryotic cells contain a nucleus in which their genetic material is separated from the rest of the cell.  Eukaryotic cells are generally larger and more complex than prokaryotic cells.  Eukaryotic cells generally contain dozens of structures and internal membranes.  Many eukaryotic cells are ...
Benchmark Review
Benchmark Review

... 27. List and explain the 4 types of asexual reproduction. a. Budding – exact replica, but smaller at first b. Binary fission sometimes called fragmentation – exact replica, equal sizes c. Regeneration – usually involves growing new body parts to replace damaged ones (starfish) but can be used for r ...
MICROSCOPE cell LEARNING TARGETS `16
MICROSCOPE cell LEARNING TARGETS `16

... MS 01. I can identify the different parts of a compound microscope, and give the function of each. MS 02. I can determine the total magnification of an object I am viewing under a compound light microscope and accurately draw the object to scale based on my field of view. MS 03. I can use a compound ...
Cells and Cell Theory PowerPoint
Cells and Cell Theory PowerPoint

... Eukaryotic Cells: 1. DNA in long strands (chromatin) in nucleus 2. Large in comparison to bacteria (prokaryotes) 3. Many membrane-bound organelles 4. All other organisms, except bacteria ...
< 1 ... 1047 1048 1049 1050 1051 1052 1053 1054 1055 ... 1231 >

Amitosis

Amitosis (a- + mitosis) is absence of mitosis, the usual form of cell division in the cells of eukaryotes. There are several senses in which eukaryotic cells can be amitotic. One refers to capability for non-mitotic division and the other refers to lack of capability for division. In one sense of the word, which is now mostly obsolete, amitosis is cell division in eukaryotic cells that happens without the usual features of mitosis as seen on microscopy, namely, without nuclear envelope breakdown and without formation of mitotic spindle and condensed chromosomes as far as microscopy can detect. However, most examples of cell division formerly thought to belong to this supposedly ""non-mitotic"" class, such as the division of unicellular eukaryotes, are today recognized as belonging to a class of mitosis called closed mitosis. A spectrum of mitotic activity can be categorized as open, semi-closed, and closed mitosis, depending on the fate of the nuclear envelope. An exception is the division of ciliate macronucleus, which is not mitotic, and the reference to this process as amitosis may be the only legitimate use of the ""non-mitotic division"" sense of the term today. In animals and plants which normally have open mitosis, the microscopic picture described in the 19th century as amitosis most likely corresponded to apoptosis, a process of programmed cell death associated with fragmentation of the nucleus and cytoplasm. Relatedly, even in the late 19th century cytologists mentioned that in larger life forms, amitosis is a ""forerunner of degeneration"".Another sense of amitotic refers to cells of certain tissues that are usually no longer capable of mitosis once the organism has matured into adulthood. In humans this is true of various muscle and nerve tissue types; if the existing ones are damaged, they cannot be replaced with new ones of equal capability. For example, cardiac muscle destroyed by heart attack and nerves destroyed by piercing trauma usually cannot regenerate. In contrast, skin cells are capable of mitosis throughout adulthood; old skin cells that die and slough off are replaced with new ones. Human liver tissue also has a sort of dormant regenerative ability; it is usually not needed or expressed but can be elicited if needed.
  • studyres.com © 2026
  • DMCA
  • Privacy
  • Terms
  • Report