• 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
Animal vs. Plant Cell
Animal vs. Plant Cell

... The two major types of cells are plant and animal cells. Plant and animal cells have many organelles in common such as the cell membrane, nucleus, chromosomes, ribosome, mitochondria, and sometimes lysosomes. Plants have organelles that animals do not have such as chloroplasts and a cell wall. You w ...
Cell Description #1 A cell is enclosed by a plasma membrane, which
Cell Description #1 A cell is enclosed by a plasma membrane, which

... mitochondria, which are responsible for the energy transactions necessary for cell survival; lysosomes, which digest unwanted materials within the cell; and the endoplasmic reticulum and the Golgi apparatus, which play important roles in the internal organization of the cell by synthesizing selected ...
Chapter 1 Review Answers
Chapter 1 Review Answers

... • stem cells are unspecialized cells that undergo differentiation, a process in which the cells become specialized • embryonic stem cells differentiate into other types of cells that perform different functions • adult stem cells result from these specialized cell types dividing and specializing fur ...
SBI 4U biochem 3
SBI 4U biochem 3

... • Membrane-bound sacs containing enzymes • Form from budding off the ER • Catalyze redox reactions • Breaks down some toxic molecules, such as alcohol. ...
Cell Structure and Transport
Cell Structure and Transport

... Nine triplets of microtubules arranged in a very special way. When two centrioles are found next to each other, they are usually at right angles. ...
ANPS 019 Beneyto-Santonja 08-31
ANPS 019 Beneyto-Santonja 08-31

...  Proteins move around, are added and removed as needed to alter cell function  The plasma membrane (the outer boundary of the cell) is only one membrane associated with the cell.  Numerous structures within the cell, including the nucleus and several organelles, also have a membrane component. Th ...
ExamView Pro - Week #27 Qwest.tst
ExamView Pro - Week #27 Qwest.tst

... ____ 42. Sac fungi reproduce sexually by first forming a(n) a. sporangium. c. basidium. b. ascus. d. gill. ____ 43. Water enters a sponge through a. the osculum. c. ostia b. collar cells. d. spicules. ____ 44. Which of the following is NOT a characteristic that all living things share? a. All living ...
Asthma - Medically fit for exams
Asthma - Medically fit for exams

... Short acting beta-2 agonist (Ventolin/salbutamol) for exacerbations. 1 puff per 30 seconds. If need more than twice a week, is poorly controlled o Act on beta-2 receptors, and cause smooth muscle relaxation o Inhibit release of mediators from mast cells Long acting beta-2 agonist – salmeterol, taken ...
cell structure and function study guide
cell structure and function study guide

... Unit 2 Cell Structure and Function Study Guide Cell Theory and Scientists There were many different scientists that had an influence in the discovery of cells. The invention and improvement of the microscope played a key role in the development of our understanding of cells. Below, you will find a l ...
The Basic Structure of Cells
The Basic Structure of Cells

... Characteristics of plant cells: • Comparatively more regular in shape • Have all the structures found in an animal cell (e.g. cell membrane, cytoplasm, nucleus and ...


... Most known prokaryotes are _______________________ Archaea (________known) ...
ch 3 review answers
ch 3 review answers

... 6. True or false: a bacterial cell is smaller than a human red blood cell. _____true_______ 7. True or false: Resolution is a measure of how clear a microscope image is. ________true_____ 8. True or false: Magnification is how much larger the image of a specimen is. _______true____ 9. True or false: ...
Cell Review PPT 2
Cell Review PPT 2

... microscopes and how to use it properly. B. I knew all four types of microscopes and but not how to use it properly. C. I did not know all four types of microscopes but I did know how to use it properly. D. I could only remember parts of this learning goal. ...
Powerpoint
Powerpoint

... concentration of water and solute molecules outside a cell is equal to the concentration of water and solute molecules inside the cell. Isotonic solutions are the ideal solution for cells to be contained in. A cell will be at equilibrium in ...
The biosynthetic basis of budding yeast cell size control
The biosynthetic basis of budding yeast cell size control

... Invitation to Seminar Talk ...
cell theory - Menihek Home Page
cell theory - Menihek Home Page

... Over the years, scientists developed what we now call “CELL THEORY”, which states: ...
Chapter 4B (Eukaryotes)
Chapter 4B (Eukaryotes)

... Microbiology Study Guide ...
Case 3
Case 3

... and is a characteristic feature of nephrogenic adenoma not seen with any of its mimickers. The signet-ring-like structures represent small tubules lined by flattened epithelium which depending on the plane of section may show only one nucleus resembling a signet ring cell carcinoma. Distinguishing i ...
Document
Document

... 7. Outline the cell theory and explain how a single cell demonstrates all the characteristics of living things (e.g. metabolism, response to ...
Cells - Dr Magrann
Cells - Dr Magrann

...  Telophase: Cytoplasm divides in two, forming two daughter cells MEIOSIS  Meiosis only occurs in the testes and ovaries when they are ready to make an egg cell or a sperm cell.  First, mitosis occurs as normal.  But right after that, the two daughter cells divide again (meiosis), but this time t ...
THE HISTORY OF CELL BIOLOGY
THE HISTORY OF CELL BIOLOGY

... 4. Critical Thinking When a spherical cell increases in diameter from 2 µm to 20 µm, by what factor does its surface area change? By what factor does its volume change? (The surface area of a sphere  4π radius2, and the volume of a sphere  4/3π radius3. Remember that diameter  2 × radius.) ...
The Great Scavenger Hunt
The Great Scavenger Hunt

... From the smallest bacteria to the largest mammal (the blue whale), all living things are composed of cells. Simple organisms, like bacteria are made of just one cell (unicellular). Complex organisms, like humans and blue whales are made of many cells (multicellular). If you were to count all of the ...
Cells - MissProctor6
Cells - MissProctor6

... assemble itself and also seal itself off if damaged. (Basically creates flexibility)  The surface of the membrane contains proteins which ‘communicate’ with the cell’s surroundings and the cell can respond accordingly. ...
CELL PROJECT: ​Due​
CELL PROJECT: ​Due​

... Directions: ​Create either a 3-D model​ ​or poster that shows the following plant cell organelles AND their functions. You MAY cut out the organelle description and function to use as labels. Rubric: Expectation: ...
SAMPLE – 90 Minute Block Agenda
SAMPLE – 90 Minute Block Agenda

... (Connect to yesterday’s or today’s learning & introduce the Essential Question and standards) ...
< 1 ... 854 855 856 857 858 859 860 861 862 ... 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