• 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
St. Bonaventure College and High School Form 4 Biology
St. Bonaventure College and High School Form 4 Biology

... • Chloroplasts are oval-shaped organelles commonly found in plant cells. • Chloroplasts, like mitochondria, have a double membrane. • Internal membranes contain the ...
Levels of Organization
Levels of Organization

... 1. Which is true of cell differentiation? A. Tissues produce various stem cells. B. Stem cells become different types of cells. C. Unicellular organisms become multicellular. 2. Which is true of unicellular organisms? A. They lack cells. B. They all are eukaryotes. C. They lack cell differentiation. ...
Cell Organelle Chart
Cell Organelle Chart

... SER- makes molecules of fat (LIPID) to be used in the cells membranes and throughout the body. ...
Principal Investigator: Dr Andrew Watts
Principal Investigator: Dr Andrew Watts

... created a unique protein that activates part of our innate immune system, only at the surface of cells we want to kill. We are then able to target our protein to cancer cells, by attaching it to antibodies which recognize the cancer. Using this technique, we believe we have the potential to develop ...
Drugs, Booze and Cigarettes
Drugs, Booze and Cigarettes

... and sometimes the Genitals. It causes cell damage if taken frequently. The brain cells are tricked by the drug into sending unusual messages to the rest of the body. Cannabis can have different effects on different people while under the influence of Cannabis. Here are a few ...
AP Biology Basic Cell Structure Outline
AP Biology Basic Cell Structure Outline

... inside a cell using the cell membrane.) B. Cells can only be so large. ( Larger means more traffic going in both directions across the cell membrane) C. A cell must be large enough to contain DNA and Ribosomes for making proteins, and some cytoplasm to act as working “space”. They can only be so big ...
Cellular Transport
Cellular Transport

... Active Transport • When energy is needed to get materials through the membrane • Osmosis and diffusion = ...
congratulations!!! you have found the vacuole!
congratulations!!! you have found the vacuole!

... could be harmful to other organelles are isolated and taken care of by being sent to the Golgi bodies. Vacuoles bring their stored material to any organelle inside the cell that needs it or to other cells if they need the stored material. Vacuoles in plant and animal cells are different in size and ...
BrainPOP for Metabolism and Mitosis
BrainPOP for Metabolism and Mitosis

... 2. How do animals and humans obtain 2. How do animals and humans obtain energy? 3. Once food is eaten, it goes through a process called ____________________. 4. What are the two categories of metabolism? ______________________ and _______________________ 5. ______________ reactions break down comple ...
Cell Function CC
Cell Function CC

... tissues: groups of similar cells that do the same sort of work (ex.- muscle tissue) organ: structure made up of different types of tissues (ex.- heart) organ system: a group of organs working together to do a certain job (ex. – cardiovascular system) circulatory system: an organ system that circulat ...
The Difference Between Plant and Animal Cells
The Difference Between Plant and Animal Cells

... Power point by: Aaron, Christopher, Jonathon, Mitchell, Caulin, and Christian ...
Type of Cell Diversity
Type of Cell Diversity

... Cell Diversity Fibroblasts – found in connective tissues which help protect, support and bind together other tissue types. They have rough ER and Golgi apparatus to make and secrete proteins needed for their fibers. Erythrocytes – red blood cells which carry oxygen in the bloodstream (no organelles ...
Chapter 7 – A Tour of the Cell
Chapter 7 – A Tour of the Cell

... - First used by Renaissance scientists (Remember Hooke and Von Leeuwenhoek). - Visible light is passed through a specimen and then through multiple lenses to enlarge the apparent object. - Object is usually stained so that some light is absorbed or induced to fluoresce. ...
Biology Review Unit for Anatomy
Biology Review Unit for Anatomy

Please
Please

... Telophase - in this final stage, spindle fibers disappear and a nuclear membrane forms around each separated set of chromosomes -cell is ready to divide Cytokinesis -is the separation of the nuclei into two daughter ...
PDF
PDF

... Unusually, in frizzled 6-null (Frz6–/–) mice, the hair follicles are orientated randomly in utero but reorientate after birth to create large-scale hair patterns. Jeremy Nathans and coworkers now describe the spatial and temporal dynamics of this hair follicle reorientation process (p. 4091). By ana ...
CELL: the smallest unit of life. CHLOROPHYLL: a material in plants
CELL: the smallest unit of life. CHLOROPHYLL: a material in plants

... First Part ...
CELLS LESSON
CELLS LESSON

... CELLS LESSON Enduring Understanding: Cells have distinct and separate organelles which perform all the life functions for their survival. ...
McDougal Notes 1.2 Cell Structure for 8th period
McDougal Notes 1.2 Cell Structure for 8th period

... Press the F5 button at the top of your keyboard to start the presentation. ...
lec01
lec01

... levels. Each has “emergent properties” not found at lower levels. • Emergent properties are where the sum is greater than the parts. • Basic unit of biology is the “cell”, we go up or down from there. ...
Cell Dinner Menu
Cell Dinner Menu

... I have my own idea of how I would like to show that I understand the structure and function of cells. (Please write your idea below and see me for approval). ...
Document
Document

... 1. Cells are the basic unit of structure and function 2. All living things are made up of one or more cells 3. All cells come from preexisting cells? ...
Cells & Microscope PowerPoint
Cells & Microscope PowerPoint

... carried out by the cells of all living things. Whether an organism is only one cell or made up of many cells, all living things: produce organisms of the same kind, obtain energy from the environment (the chemical activities involved in this are called metabolism and include processes such as respir ...
Cells Teacher Information The study of cells is called cytology
Cells Teacher Information The study of cells is called cytology

... of a metre. There are one thousand micrometres in one millimetre. The symbol for one micrometre is um. The largest single cell is the ostrich egg. Most species of organisms are composed of millions of cells. As previously mentioned there are unicellular life forms, such as the protozoa. Multicellula ...
Cell life
Cell life

... 3. Every cell in your body has the same genetic information copied from your first cell. 4. There are over two hundred different types of cells in your body. 5. There are about 20 different organelles and structures in cells. 6. Most cells are colorless and transparent. 7. To see cells, you need a m ...
< 1 ... 1090 1091 1092 1093 1094 1095 1096 1097 1098 ... 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 © 2025
  • DMCA
  • Privacy
  • Terms
  • Report