Microscopes and cells Study guides, Class notes & Summaries
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IB Biology Unit 1 Latest Update Graded A+
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IB Biology Unit 1 Latest Update 
 
Graded A+ 
 
Cell theory 3 main principles All organisms are composed of one or more cells 
cells are the smallest units of life 
all cells come from pre-existing cells 
 
7 functions of life (MR H GREN) 
metabolism 
reproduction 
homeostasis 
growth 
excretion 
 
response 
nutrition 
 
Paramecium unicellular membrane of the kingdom known as Protista. Look at powerpoint on 
isa247 to see how this organism displays the functions of life. 
 
chlorella single-cell...
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All Subject Study Guide for 7th Grade Comprehinsive (Physics, biology, chemistry, math, english, and spanish) Exam| Actual Questions and Answers 100% Correct| Latest Update 2024
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Homeostasis When organisms maintain a stable internal environment even 
when external conditions change 
Metabolism Combination of chemical reactions taking place within an 
organism 
Stimulus A signal to which an organism responds 
Biosphere Means "living planet" 
Robert Hooke Scientist who looked at cork through a microscope and gave 
the name to cells 
Light Microscope A type of microscope 
Can magnify 1000x 
Not as strong as other microscopes 
Uses light 
Scanning Electron Microscope A typ...
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Bio 250 Exam 1 Study Guide || All Questions Answered Correctly.
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Why is it important to study microbiology? 
 
A. Microorganisms are part of the natural environment and important to nutrient cycling. 
 
B. Microorganisms are vital to producing essential products. 
 
C. Microorganisms are excellent subjects on which to conduct scientific research. 
 
D. Microorganisms are linked to many human diseases. 
 
E. All of these. correct answers E 
 
Which of these groups are single-celled and possess a nucleus? 
 
 A. Fungi 
 B. Bacteria 
 C. Viruses 
 D. Protozoa 
 ...
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Bio principles Exam 2 – Brooks Latest Update Graded A+
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Bio principles Exam 2 – Brooks Latest 
 
Update Graded A+ 
 
Cytology the study of cells 
 
Robert Hooke - observed cork could float 
 
- discovered a honeycomb-like structure in a cork slice using a primitive compound microscope 
- only saw cell walls as this was dead tissue 
- coined the term "cell" for these individual compartments he saw 
 
Two types of microscopes: 1. Light Microscope 
2. Electron Microscope 
 
Light Microscope - light is focused on specimen by a glass condenser lens 
-...
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Bio principles Exam 2 – Brooks Latest Update Graded A+
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Cytology the study of cells 
Robert Hooke - observed cork could float 
- discovered a honeycomb-like structure in a cork slice using a primitive compound microscope 
- only saw cell walls as this was dead tissue 
- coined the term "cell" for these individual compartments he saw 
Two types of microscopes: 1. Light Microscope 
2. Electron Microscope 
Light Microscope - light is focused on specimen by a glass condenser lens 
- the image is magnified by an objective lens and an ocular lens 
- proj...
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Brooks Biological Principles Exam 2 Latest Update with Verified Solutions
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Cytology the study of cells 
Cell Theory all living things are composed of cells and come from living cells 
Robert Hooke one of the first to use microscope, observing a piece of cork from the stem of 
plants, where he found chambers arising in the idea of a cell. 
Light Microscope takes pictures of large atoms. 
nucleus, not electrons 
Scanning Electron Microscope electrons are reflected off of a specimen and are analyzed by 
a computer to create a 3D image 
Transmission Electron Microscope Mic...
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IB Biology 1.2 Latest Update Already Passed
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IB Biology 1.2 Latest Update Already 
 
Passed 
 
Resolution Resolution is defined as the shortest distance between two points that can be 
distinquished 
 
Explain why electron microscopes have a better resolution than light microscopes because 
the wavelength of the electrons is thousands of times smaller than the wavelength of light. 
 
Ultrastructure all the structures of a biological specimen that are at least 0.1 nm in their 
smallest dimension 
 
Something that electron microscopes can se...
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All Subject Study Guide for 7th Grade Comprehinsive (Physics, biology, chemistry, math, english, and spanish) Exam| Actual Questions and Answers 100% Correct| Latest Update 2024
- Exam (elaborations) • 49 pages • 2024
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Homeostasis When organisms maintain a stable internal environment even 
when external conditions change 
Metabolism Combination of chemical reactions taking place within an 
organism 
Stimulus A signal to which an organism responds 
Biosphere Means "living planet" 
Robert Hooke Scientist who looked at cork through a microscope and gave 
the name to cells 
Light Microscope A type of microscope 
Can magnify 1000x 
Not as strong as other microscopes 
Uses light 
Scanning Electron Microscope A typ...
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MMSC490 Practice Exam 1 (100% Accurate Answers)
- Exam (elaborations) • 19 pages • 2023
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cytoplasmic organelles are: 
a. absent in prokaryotic cells and present in eukaryotic cells. 
b. present in both prokaryotic and eukaryotic cells. 
c. present in prokaryotic cells and absent in eukaryotic cells. 
d. absent in both prokaryotic and eukaryotic cells. correct answers a. absent in prokaryotic cells and present in eukaryotic cells 
 
E. coli is a useful model system for molecular biology studies because: 
a. it has a small genome. 
b. it reproduces rapidly. 
c. mutants can easily be i...
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PLTW: Principles of Biomedical Sciences, National Exam Questions And Answers Graded A+
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Prophase I - crossing-over occurs between tetrads 
Metaphase I - Paired homologous chromosomes line up across the center of the cell 
Anaphase I - Spindle fibers pull each homologous chromosome pair toward an opposite end of 
the cell 
Telophase - A nuclear membrane forms around each cluster of chromosomes and cytokinesis 
follows, forming two new cells 
Prophase II - Chromosomes consist of two chromatids, but they do not pair to form tetrads 
Telophase II - A nuclear membrane forms around each ...
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