• 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
Notes Chapter 4 Structure and Function of the Cell
Notes Chapter 4 Structure and Function of the Cell

...  The cytoskeleton includes microfilaments and microtubules, strands of protein that help cells move and maintain their shape.  Cilia and flagella assist in cell movement. Both are made of nine pairs of microtubules arranged around a central pair.  The nucleus is surrounded by a double membrane an ...
Microscopes allow us to see inside the cell.
Microscopes allow us to see inside the cell.

... All living things are made up of one or more cells. Organisms share the following characteristics: • organization • ability to grow and develop • ability to respond • ability to reproduce ...
Cell Division
Cell Division

...  The cell grows & elongates, separating the two chromosomes  The plasma membrane and cell wall pinch inward, eventually forming two daughter cells ...
Continuous Culture
Continuous Culture

... the replicated genomes, this phase includes synthesis of microtubules and condensation of DNA to form coherent chromosomes, a gap phase separating chromosome replication from miosis. ...
English_Tumbuh Kembang hewan2005-01
English_Tumbuh Kembang hewan2005-01

... (more then 3 months) In leaf caterpillars metamorphosis happens perfectly (holometabola). It means the change of one phase to another is observed clearly. The metamorphosis of dragon fly is not perfect (hemimetabola). Hal.: 6 ...
Lesson 2 - Leon County Schools
Lesson 2 - Leon County Schools

... What do you think? Read the three statements below and decide whether you agree or disagree with them. Place an A in the Before column if you agree with the statement or a D if you disagree. After you’ve read this lesson, reread the statements and see if you have changed your mind. ...
The Cell: An Overview
The Cell: An Overview

... Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. ...
Apoptosis Oncogenes
Apoptosis Oncogenes

... • Proto-oncogenes – genes that encode proteins that promote cell division or that promote resistence to apoptosis • Their activating mutation or overexpression results in increased actvity unregulated cell division or resistence to apoptosis • Mutations in proto-oncogens  oncogens • Only one allel ...
From a Cell to an Organism Levels of Organization
From a Cell to an Organism Levels of Organization

... What do you think? Read the three statements below and decide whether you agree or disagree with them. Place an A in the Before column if you agree with the statement or a D if you disagree. After you’ve read this lesson, reread the statements and see if you have changed your mind. ...
Buckling along boundaries of elastic contrast as a mechanism for
Buckling along boundaries of elastic contrast as a mechanism for

... The problem of animal formation - especially that of vertebrates - is still largely open. In historical times, it was believed that “Bauplans” (body plans) existed [1] for primitive animal forms. In this view, some form of discontinuous evolution acting at the global scale of the animal body, was ne ...
news and views Cell cycle micromanagement in
news and views Cell cycle micromanagement in

... Embryonic stem (ES) cells are derived from the inner cell mass of an early-stage embryo known as a blastocyst. ES cells can differentiate into all cell types of the adult body and, in the absence of stimuli, can infinitely divide without losing the capacity of self-renewal. Because of these capaciti ...
Plant cells - Cloudfront.net
Plant cells - Cloudfront.net

... -We said a vacuole is a fluid filled organelles that store water, wastes, and sometimes enzymes. - There usually is 1 large vacuole in plant cells. Plants have larger vacuoles because they may not always get water…so they have to store it and slowly use it. ...
Chapter 3 The Basic Structure of a Cell
Chapter 3 The Basic Structure of a Cell

... The cell is the Basic Unit of Life • Cell is the smallest unit of living organisms • Unicellular organisms are made of one cell only • The cells of multicellular organisms are specialized to perform different functions ...
Types of Transport
Types of Transport

... *They require specific _________________________ to pass through membranes. *Many ion channels have _____________ that close or open in response to 3 stimuli: a. ________________________________ b. ________________________________ c. ________________________________ ...
Smooth endoplasmic reticulum
Smooth endoplasmic reticulum

... bloodstream. In muscles the smooth ER assists in the contraction of muscle cells. Similarly , cells of the ovaries and testes, which produce the lipid-containing hormones estrogen and testosterone, contain large amounts of SER. Another function of SER is the control the movement of newly synthesized ...
Cell Organelles
Cell Organelles

... a piece of cardboard 11” X 18”with the cell taking up half the cardboard and a corresponding legend on the other side. DAY 1: Teacher may use pictures and lecture to discuss the function of plant and animal cells or rely on student textbook information. The differences between and a plant cell and a ...
Cell Organelles Worksheet
Cell Organelles Worksheet

... connecting them ...
botany practice test i - sample questions-doc
botany practice test i - sample questions-doc

... E. Sunlight energy is captured by a plant leaf through the process called photosynthesis. ...
Fall 2013 Exam Review Review Which statement best describes
Fall 2013 Exam Review Review Which statement best describes

... c. Your brain sends a signal that results in your feeling hungry. d. Your body produces more sweat. 59. The process by which an organism's internal environment is kept stable in spite of changes in the external environment is called a. growth b. digestion c. homeostasis d. respiration 60. The presen ...
Cellular Reproduction notes
Cellular Reproduction notes

...  At the time of fertilization, the two haploid gametes (sperm and ovum) unite to form a diploid cell called the zygote  Fertilization results in the formation of a diploid cell, thus restoring the normal diploid number of human chromosomes  Meiosis occurs in reproductive organs ...
A Tour of the Cell
A Tour of the Cell

... Representative EM images of Pst DC3000 avrPto (pAVRPTO), immunogold-labeled with the AvrPto antibody. In situ immunogold labeling was done after bacteria were grown in hrp-inducing medium for 4 hours, supplemented with (A) no SA, (B) SA for 4 hours, or (C and D) SA for 1 hour. Dark dots are 15-nm g ...
Date - Pearland ISD
Date - Pearland ISD

... in eukaryotic cells. It _________________ all cell activity. The nuclear membrane has many ____________________. The thick ropy strands are the _____________________________. The large solid spot is the _____________________. The nucleolus is a ____________ of chromatin. It manufactures ____________ ...
Chapter 6 review notes on Cell Transport and Plant and Animal Cell
Chapter 6 review notes on Cell Transport and Plant and Animal Cell

... • Endocytosis and Exocytosis is the mechanism by which very large molecules (such as food and wastes) get into and out of the cell ...
Unit 8-B Study Guide Questions
Unit 8-B Study Guide Questions

... 1) List and explain the six characteristics of life. 2) Give two examples of different organisms with different structures that have the same function. 3) Discuss Darwin’s species of finches and their variation in bill shape. 4) List the six of the eight main organ systems and identify the main stru ...
Concept!Covered:!The!Cell!Cycle!
Concept!Covered:!The!Cell!Cycle!

... 1. %The%cell%cycle%is%the%series%of%events%that%cells%go%through%as% they%grow%and%divide.%%It%is%the%life%of%the%cell%from%the%9me%it%is% first%formed%from%a%dividing%parent%cell%un9l%its%own%division% into%two%cells.% ...
< 1 ... 798 799 800 801 802 803 804 805 806 ... 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