• 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
shaw ch 4 ppt - Spring
shaw ch 4 ppt - Spring

... Several cell layers, basal (bottom) cells are cuboidal or columnar, surface cells are dome shaped (appearance varies depending on the degree of distension) Function: Stretches to permit the distension of the urinary bladder ◦ Filled with urine thins from 5-6 cell layer to 2-3 and dome-like apical c ...
Document
Document

... ____ 16. Ingenhousz showed that plants produce oxygen bubbles when exposed to a. ATP. c. light. b. carbon dioxide. d. a burning candle. ____ 17. Photosynthesis uses sunlight to convert water and carbon dioxide into a. oxygen. c. ATP and oxygen. b. high-energy sugars. d. oxygen and high-energy sugars ...
File - Bray Family Medicine
File - Bray Family Medicine

... three most common types of skin cancer are basal cell carcinoma, squamous cell carcinoma and melanoma. The first two are slow growing and can usually be easily treated. But if not treated, they can become large and cause problems with the surrounding tissue. These are most often on the sun exposed s ...
Cancer chemotherapy
Cancer chemotherapy

... 3- Curable in diffuse non resectable neoplasms: in certain types of cancer as Hodgkin's and non-Hodgkin's lymphoma Mode of action of anticancer drugs: They act by inhibition of cell multiplications through interruption of cell cycle which consists of: 1- Go phase: resting state: cell is not dividing ...
LEVELS OF ORGANIZATION
LEVELS OF ORGANIZATION

... „ A complex network of organisms working together in a physical environment, linked by a one way flow of energy and cycling of material, multiple communities working together ...
Onion Cell and Cheek Cell Lab Background: Onion skin cells have
Onion Cell and Cheek Cell Lab Background: Onion skin cells have

... Obtain a small piece of onion skin from teacher and a cup of iodine. Place the onion skin on a clean slide and use one of the eye droppers to place a small drop of iodine on the onion skin. Do not drench the onion skin, one drop is plenty. Carefully place the slide cover on the slide trying not to h ...
Onion Cell and Cheek Cell Lab
Onion Cell and Cheek Cell Lab

... Obtain a small piece of onion skin from teacher and a cup of iodine. Place the onion skin on a clean slide and use one of the eye droppers to place a small drop of iodine on the onion skin. Do not drench the onion skin, one drop is plenty. Carefully place the slide cover on the slide trying not to h ...
Cell Organelles - walker2011
Cell Organelles - walker2011

... Vesicles that digest worn-out organelles or food particles are called ____. lysosomes centrioles plasma membranes ribosomes Question #2 (1 point) Which part of a plant cell contains chlorophyll? The nucleus The cytoplasm The chloroplasts The cell membrane Question #3 (1 point) What do we call a grou ...
BIOLOGY
BIOLOGY

... Cell A Cell B Cell C Cell D ...
Nanomaterials for Live Cell Tracking (2006
Nanomaterials for Live Cell Tracking (2006

... Monodisperse NPs of many compositions have been developed, each coated with an organic layer to be compatible with living cells. These include semiconductor quantum dots, super-paramagnetic iron oxide NPs, magnetic NPs, dye-doped NPs, and gadolinium (Gd) NPs. This interdisciplinary research takes ad ...
Answers to End-of-Chapter Questions – Brooker et al ARIS site
Answers to End-of-Chapter Questions – Brooker et al ARIS site

... in the recipient oocytes; however, the oocytes that were exposed to progesterone for 12 hours did induce maturation in the recipient oocytes. The researchers suggested that the 2-hour time span did not allow for the accumulation of proteins necessary for maturation before the transfer of cytosol occ ...
Cellular anatomy Tissues types
Cellular anatomy Tissues types

... epithelium consists of many cells clustered close-together. The deeper pink-staining region is connective tissue. There are fewer cells in connective tissue. ...
The Cell
The Cell

... In 1839, Theodor Schwann stated that all animals were made of cells. In 1855, Rudolph Virchow concluded that new cells were created only from division of existing cells. These discoveries led to the cell theory. ...
Presentation
Presentation

... Intact nuclear envelope Kinetochore microtubules ...
Chapter 13: Vesicular Traffic
Chapter 13: Vesicular Traffic

... Very simple GAG, consisting of 10,000+ repeats of glucuronic acid and N-acetylglucosamine Spun directly from cell membranes by a surface enzyme complex Attracts water and fills spaces between cells with non-compressible gel (found around joints) Some cells secrete it to isolate themselves from other ...
Chapter 23 Section 2
Chapter 23 Section 2

...  Darwin combined this fact with the idea that as a result of natural dangers that there will always be more creatures born than can survive  Those that survive will then be the best of the species that can adapt to the environment around them.  They will then produce offspring that possess the ch ...
A Novel, Multifactorial Approach for hiPSC Differentiation
A Novel, Multifactorial Approach for hiPSC Differentiation

Chapter 19: Cell junctions and the extracellular matrix
Chapter 19: Cell junctions and the extracellular matrix

... Very simple GAG, consisting of 10,000+ repeats of glucuronic acid and N-acetylglucosamine Spun directly from cell membranes by a surface enzyme complex Attracts water and fills spaces between cells with non-compressible gel (found around joints) Some cells secrete it to isolate themselves from other ...
The Plant Cell: Peeping into Potatoes, Peppers, and Pears
The Plant Cell: Peeping into Potatoes, Peppers, and Pears

... 5. The specialized structural cells that give pears their gritty structure are called sclerids. Sclerids have a thickened primary cell wall, and also secrete a secondary cell wall as well. The thickening of both is mostly due to lignin. These cells are usually dead at maturity. Why? Use a razor blad ...
Introduction: Hemoglobin is an essential protein necessary for the
Introduction: Hemoglobin is an essential protein necessary for the

... Hemoglobin is an essential protein necessary for the transport of oxygen and carbon dioxide in the body. Biochemists study the molecular activities necessary for the exchange and transport of oxygen and carbon dioxide between the body cells and lungs. As a biochemist you have been asked to design a ...
The Prokaryotic Cell
The Prokaryotic Cell

... eukaryotes and are involved in protein synthesis. The rate at which bacteria divide requires a high level of protein synthesis and thus many ribosomes are needed. Thus ribosomes may constitute as much as 40% of the cell mass. Prokaryotic cells possess 70S ribosomes whereas eukaryotic cells possess 8 ...
No Slide Title
No Slide Title

... go all the way through & touch both sides ...
The Prokaryotic Cell - Blue Coat Church of England School
The Prokaryotic Cell - Blue Coat Church of England School

... eukaryotes and are involved in protein synthesis. The rate at which bacteria divide requires a high level of protein synthesis and thus many ribosomes are needed. Thus ribosomes may constitute as much as 40% of the cell mass. Prokaryotic cells possess 70S ribosomes whereas eukaryotic cells possess 8 ...
Type the name of the lesson here
Type the name of the lesson here

... to as chlorosis which is caused by changes in the plant’s environment (light conditions) /addition of herbicides/insects such as aphids, mealy bugs and scale /nitrogen deficiencies or too much/too little water. It is pointed out that it is difficult to ascertain which is the causative factor at face ...
BIOL 1308
BIOL 1308

... Prokaryotic and eukaryotic cells Dynamics of nutrients and energy in an ecosystem. Domains of life Process of natural selection Quantitative and qualitative data Inductive and deductive reasoning Scientific theory and a hypothesis Impacts of evolution Importance of chemical elements Formation of com ...
< 1 ... 739 740 741 742 743 744 745 746 747 ... 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