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The Cell Theory
The Cell Theory

... • Brown observed the nucleus ...
Differences between the animal and plant cell: The plant cell has a
Differences between the animal and plant cell: The plant cell has a

... The plant cell has a huge, central vacuole compared to the small animal vacuoles(3). Plants store a lot of water, and the vacuole creates (hydrostatic) pressure, making green structures stand up. With no cell wall, animal cells would explode under pressure. ...
Cell Structure and Function Study Guide
Cell Structure and Function Study Guide

... Be prepared to know the location and key words to define the cell parts. Use your worksheet from class to study the parts. You must be able to identify the following organelles by shape so you can label each part. You must also know the function of each cell part. Cell wall Mitochondria Chloroplast ...
vocab flip chart - Effingham County Schools
vocab flip chart - Effingham County Schools

... a possible explanation or answer to a scientific question. ...
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The “brains” of the cell, that directs cell activities and contains

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Cell Cycle regulation

cell_structure_tt
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Cell Parts and Functions Review Crossword
Cell Parts and Functions Review Crossword

... Cell Parts and Functions Review Crossword ...
LT2a, 1b size.
LT2a, 1b size.

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Mitosis in Cancer Cells

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Biology Final Jeopary 2

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Cells and Microscope Test Study Guide

... Use your notes and handouts to help you study!  Know different parts of cell and function of each part (what it does) Cell membrane Cytoplasm Nucleus Vacuole Mitochondria Chloroplast Cell wall  Understand that cells are the basic unit of structure and function of all living things  Know what make ...
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chapter 4.3 notes

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No Slide Title

... This onion root tip cell is in this stage of mitosis. ...
Chapter 40
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... common ancestor b. Coevolution occurs more often in homologous structures c. Sympatric and Allopatric isolation can create homologies ...
Scientists – Microscopes
Scientists – Microscopes

... 3. Robert Brown When: 1800’s Discovery: nucleus Observation: observed objects in the center of cells 4. Matthias Schleiden* When: 1830’s Observations: Used microscope to study plant parts Conclusion:  All plants made of cells  Nucleus plays a role in cell reproduction (expanded on Brown’s observat ...
$doc.title

... 3. DNA    condenses  into  chromosomes   4. Homologous  pairs  of  chromosomes  (one  from  mom,  one  from  dad)     match  up   ...
Onion Root Tip Lab
Onion Root Tip Lab

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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.
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