• 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
Prokaryotic and Eukaryotic Cells
Prokaryotic and Eukaryotic Cells

... bacteria? All cells - whether from bacteria, human, or any other organism - will be one of two general types. In fact, all cells other than bacteria will be one type, and bacterial cells will be the other. And it all depends on how the cell stores its DNA. Two Types of Cells There is another basic c ...
Click here for Section 5.1 Study Guide
Click here for Section 5.1 Study Guide

... oxygen and other nutrients that must move across its cell membrane. Larger cells can increase their surface area by being long and thin (like a neuron) or folded in some way to increase surface area. 10. Suppose you treat cells with chemicals that block cytokinesis. Describe what you think the daugh ...
Animal-Plant Cell Activity
Animal-Plant Cell Activity

... organelle belongs in from the list of departments below. Once you have determined the department, explain why. Also, determine whether the organelle is found in animal, plant or both cells. Department(s) Office of the Director Production Waste Treatment and Recycling Security and Doorman Storage ...
Ch. 1 - Cell Organelles Worksheet
Ch. 1 - Cell Organelles Worksheet

... the ER, contain enzymes for modifying proteins and lipids, package finished products into vesicles for transport to the cell membrane (for secretion out of the cell) and within the cell as lysosomes. ...
腫瘍の不均一性と微小環境
腫瘍の不均一性と微小環境

... Contact : Division of Molecular Carcinogenesis, Arakawa (ext 2454) ...
NOT animal cells.
NOT animal cells.

... Plant vs. Animal Cell ...
Cell Biology Lecture
Cell Biology Lecture

... Eukaryotic Cells and Viruses • Q: Which have an outer membrane? • A: Prokaryotic/Eukaryotic ...
In This Issue - The Journal of Cell Biology
In This Issue - The Journal of Cell Biology

... he inner membrane of a chloroplast bristles with enzymes and other proteins that are synthesized in the cytoplasm, but how they get into position is uncertain. On page 249, Li and Schnell report that at least some proteins pass through the inner membrane and reenter it from the back side, rather tha ...
File
File

... Objectives/Where does this fit Objective/Review ...
Chapter 1 Cells
Chapter 1 Cells

... Describe three ways in which a plant cell is different from an animal cell. A ...
FIGURE 18.1
FIGURE 18.1

... – Most 1-10 μm; seen in fossil record by 3.5 bya; lack a nucleus and other membrane-bound organelles (DNA free in cell, in nucleoid ...
Observing Plasmolysis in Elodea
Observing Plasmolysis in Elodea

... include the bacteria and archaeans, is called prokaryotic, Greek for "before the nucleus". The second type of cell, which almost certainly evolved from the prokaryotic cell and makes up the bodies of protests, plants, fungi, and animals, is called eukaryotic, for "true nucleus". Eukaryotic cells con ...
It’s Alive!! Or is it?
It’s Alive!! Or is it?

... It’s Alive!! Or is it? ...
Name Date ______ Period _____
Name Date ______ Period _____

... The ____________________ provides the interior _________________ of a cell. There are three basic kinds of cytoskeletal fibers. 1. _____________________: long slender filaments made of the protein actin 2. _______________________: hollow tubes made of the protein tubulin. 3. Intermediate fibers: thi ...
Lesson 3.1– CELL CYCLE AND CELL DIVISION
Lesson 3.1– CELL CYCLE AND CELL DIVISION

... Organize the information about the 2 main phases of the cell cycle. Interphase – longest phase, where cell grows, organelles and DNA are duplicated in preparation of cell division Mitotic phase – shorter phase, where nucleus divides and cell splits into two identical daughter cells. Complete the sen ...
Unit 2 Notes All organisms are made of cells. Osmosis is the
Unit 2 Notes All organisms are made of cells. Osmosis is the

... Passive Transport is the movement of material into or out of the cell without expending any energy. Endocytosis is the process by which the cell membrane envelops material too large to pass directly through the membrane or protein channel. Exocytosis is the process by which a cell expels waste or ce ...
Click here for the Study Guide Key
Click here for the Study Guide Key

... 8. Differentiate (compare and contrast) between unicellular vs. multicellular cells and animal vs. plant cells. Unicellular would be a single cell moving and performing the functions of life on its own. A multicellular organism would be a collection of cells, probably attached to one another so that ...
Cell Organelles
Cell Organelles

... bad stuff out. ...
Cells
Cells

... The cell wall is found surrounding plant cells only This surrounds the cell membrane of a plant cell and gives the cell protection and ...
Vocab and Functions
Vocab and Functions

... organism made up of cells that have a nucleus enclosed by a membrane; eukaryotes include protists, animals, plants, and fungi but archaea or bacteria.  “eu” = good or true ...
Cellular Structure and Function Web Research 100 pts
Cellular Structure and Function Web Research 100 pts

... In this activity, students explore the structure and function of the cell. They begin by identifying the cell as the common unit of life in all living organisms, large and small. Students learn about single-celled organisms and how they carry out different life functions. Then they use a Web activit ...
Cell Theory and Cell Structure
Cell Theory and Cell Structure

... numerous, hair-like projections from the plasma membrane.  Move with a coordinated beating action. ...
III Sensory - Washington State University
III Sensory - Washington State University

... something that is happening when a Paramecium moves through the debris of pond water, bumping into this and that, backing up and taking another direction. • A mechanical stimulus is potentially a threat. Speed of response requires that mechanical distortion be transduced by mechanical linkage to ion ...
Final Review Questions
Final Review Questions

... • Diffusion: the natural tendency of molecules to move from an area of higher concentration to an area of lower concentration • Osmosis: the diffusion of water across a selectively permeable membrane from an area of high concentration to an area of low concentration. 6. Cell Theory • What are the ma ...
What are all living things composed of?
What are all living things composed of?

... • Created a microscope • Saw living things in milk, pond water, etc Matthias Schlieden • Looked at plants and concluded they were composed of cells Theodore Schwann • Animals composed of cells Rudolph Virchow • All cells come from existing cells ...
< 1 ... 988 989 990 991 992 993 994 995 996 ... 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