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asdfs - Home - South Johnston High School
asdfs - Home - South Johnston High School

... binary fission flagella have 9+2 flagella-single filament Bigger ribosomes smaller ribosomes Centrioles no centrioles Steroids in cell membrane no steroids There are more…… ...
chapter 4 student notes
chapter 4 student notes

... 1. ____________: Group of similar cells that function together to carry out specialized activities and usually have a common embryonic origin 2. _____________: Science that deals with the study of tissues 3. _____________: Physician who specializes in laboratory studies of cells and tissues for chan ...
Chapter 4 - Los Angeles City College
Chapter 4 - Los Angeles City College

... Senses stimuli and transmits signals from one part of the animal to another.  Controls the activity of muscles and glands, and allows the animal to respond to its environment.  Neuron: Nerve cell. Structural and functional unit of nervous tissue. Consists of:  Cell body : Contains cell’s nucleus. ...
theory of evolution
theory of evolution

... • Predation: consumption of one organism, plant/animal, by the other • Parasitism: two organisms living together; one benefits at the expense of the other • Co-evolution: evolution of one species depends on part of another’s evolution • Succession and climax communities: gradual changes in vegetatio ...
Cells and Reproduction
Cells and Reproduction

... Find out about another type of cell in a plant or animal or human and how it is adapted to do its job. Your teacher may ask you to present this to the class. ...
The Human Body - Net Start Class
The Human Body - Net Start Class

... Protection of organs Provides shape. Enables movement. Produces red blood cells. Stores materials. ...
Name
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... 4. Describe ways that human activities can change the number of populations in an ecosystem and then explain what would happen if our actions destroyed one entire population, what effect would that have on other populations found there? ...
Human Body Systems Notes for Coloring
Human Body Systems Notes for Coloring

... Tendons attach muscles to bones Voluntary Muscles – Under conscious control – You make them move Involuntary Muscles – Not under conscious control – work automatically. ...
DiagnosticTest
DiagnosticTest

... b. Intestinal juice c. Mucus d. Pancreatic juice ...
Biology STAAR Review #4 – Body systems
Biology STAAR Review #4 – Body systems

... destroy virus- infected cells. Nerves in the nervous system sense pain from a fire on the skin ...
Respiratory System
Respiratory System

... • “Respiration” is used several different ways: • Cellular respiration is the aerobic breakdown of glucose in the mitochondria to make ATP. • Respiratory systems are the organs in animals that exchange gases with the environment. • “Respiration” is an everyday term that is often used to mean “breath ...
Nerve activates contraction
Nerve activates contraction

... Convergence occurs because natural selection shapes similar adaptations when diverse organisms face the same environmental challenge, such as the resistance of water to fast travel. Convergent evolution ...
Biology Microbiology: Bacteria I
Biology Microbiology: Bacteria I

... the body, where they are harmless, to another part, where they cause illness (as when E coli spreads from the intestines to the urinary tract). Human waste treatment involves many different processes in order to remove contaminants from sewage water so that it can be once again reused. The process o ...
Biology: Microbiology: Bacteria I
Biology: Microbiology: Bacteria I

... the body, where they are harmless, to another part, where they cause illness (as when E coli spreads from the intestines to the urinary tract). Human waste treatment involves many different processes in order to remove contaminants from sewage water so that it can be once again reused. The process o ...
Respiratory System
Respiratory System

... • “Respiration” is used several different ways: • Cellular respiration is the aerobic breakdown of glucose in the mitochondria to make ATP. ...
ce_ch15_e
ce_ch15_e

... D becomes thicker. It is caused by the contraction of ciliary muscles (A). This reduces the tension of suspensory ligaments. (b) I can detect the form and colour of an object but J cannot. It is because I is concentrated with cone cells which are responsible for colour vision but J does not contain ...
Chapter 1 Lecture Notes
Chapter 1 Lecture Notes

... A. Biologists look at life both vertically, as in Figure 1.1, and horizontally. There is a stunning array of different species that inhabit or once inhabited the Earth. Species is the term used for one type of organism (e.g., Homo sapiens or Pelecanus occidentalis). B. Making sense of the diverse li ...
Summary – What you should know
Summary – What you should know

... Cell membrane— controls entry and exit from the cell Parts of the microscope A stain helps to show up the parts of a cell Specialised cells— nerve cells, Red blood cells Body Systems The human body is made of systems Each system is in turn made up of organs Some systems are the digestive, muscular, ...
What is the nervous system?
What is the nervous system?

... The nervous system is the highway along which your brain sends and receives information about what is happening in the body and around it. This highway is made up of billions of nerve cells, or neurons (say newrons) which join together to make nerves.  A nerve is a fibre that sends impulses through ...
Clicker REVIEW ?s
Clicker REVIEW ?s

... 12) What type of bacterial structure mediates conjugation? A Cilia B Flagella C Fimbrae D Pili 13) Which of the following is NOT a source of nutrients or energy for bacteria? A Chemicals B Carbon C Sunlight D Inorganic matter 14) What are the four factors that influence bacterial growth? A Temperatu ...
Animal Cell Structure
Animal Cell Structure

... Nucleolus - The nucleolus is a membrane-less organelle within the nucleus that manufactures ribosomes, the cell's protein-producing structures. Through the microscope, the nucleolus looks like a large dark spot within the nucleus. A nucleus may contain up to four nucleoli, but within each species th ...
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... PanI is a gene in cod fish that codes for an integral membrane protein called pantophysin. Two alleles of the gene, PanIA and PanIB, code for versions of pantophysin, that differ by four amino acids in one region of the protein. Samples of cod fish were collected from 23 locations in the north Atlan ...
STUDY GUIDE FOR 6TH GRADE SCIENCE MIDTERM EXAM
STUDY GUIDE FOR 6TH GRADE SCIENCE MIDTERM EXAM

... Nucleus – the control center of the cell containing DNA Chromosome – structures of DNA found in the nucleus Vacuole- site for storage of chemicals or other essential nutrients needed ...
CH 7 Cell Structure and Function
CH 7 Cell Structure and Function

... RUDOLPH VIRCHOW • In 1858, stated that all cells could form only from other cells ...
Exam 1
Exam 1

... 35. In the reaction (H2O + CO2  H2CO3), increasing the concentration of H2O would A. decrease the concentration of H2CO3. B. increase the concentration of CO2. C. have no effect on either CO2 or H2CO3 concentrations. *D. increase the concentration of H2CO3. 36. In an enzymatic reaction, when temper ...
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Cell theory



In biology, cell theory is a scientific theory which describes the properties of cells. These cells are the basic unit of structure in all organisms and also the basic unit of reproduction. With continual improvements made to microscopes over time, magnification technology advanced enough to discover cells in the 17th century. This discovery is largely attributed to Robert Hooke, and began the scientific study of cells, also known as cell biology. Over a century later, many debates about cells began amongst scientists. Most of these debates involved the nature of cellular regeneration, and the idea of cells as a fundamental unit of life. Cell theory was eventually formulated in 1838. This is usually credited to Matthias Schleiden and Theodor Schwann. However, many other scientists like Rudolf Virchow contributed to the theory. Cell theory has become the foundation of biology and is the most widely accepted explanation of the function of cells.The three tenets to the cell theory are as described below: All living organisms are composed of one or more cells. The cell is the most basic unit of life. All cells arise from pre-existing, living cells, by biogenesis.
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