• 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
Staying alive  Department of Science
Staying alive Department of Science

... vacuoles, if any. It stores food, water, and other materials for use by the cell. Wastes may also be stored in vacuoles. The lysosome is a small, round structure common in animal cells, but not usually found in plant cells. The lysosome is involved in digestive activities, including breaking down la ...
On Your Own” Questions - Kingdom Builders Coop
On Your Own” Questions - Kingdom Builders Coop

... 1.3 A biologist studies an organism and then two of its offspring. They are all identical in every possible way. Do these organisms reproduce sexually or asexually? _____________________ 1.4 When trying to convince you of something, people will often insert “Science has proven...” at the beginning o ...
Cell Biology
Cell Biology

... Living things Like you, the atmosphere is also made mostly of carbon, hydrogen, have complex and oxygen. But the atmosphere is not alive. The key to life is how molecules these elements are put together. In the atmosphere, they are in the form of simple compounds like carbon dioxide and water. In li ...
Topic 1 Patterns in Nature
Topic 1 Patterns in Nature

... between living organisms. There are more similarities than differences in the overall processes involved, the elements used and the molecules made. Intake of the materials required by all living organisms and the removal of waste products are influenced by the surface areas of membranes through whic ...
Life Science
Life Science

... Photosynthesis & Cellular Respiration • Describe how plants use energy from the Sun to produce food and oxygen through the process of photosynthesis (DOK 1) • Identify the reactants (water and carbon dioxide) and products (energy-rich sugar molecules and oxygen) that takes place in the presence of l ...
TOPIC 5 Energy for biological processes 5.1 Cellular respiration
TOPIC 5 Energy for biological processes 5.1 Cellular respiration

... Peter Mitchell proposed that protons are actively transported into the space between the inner and outer mitochondrial membranes, using the energy provided as the electrons pass along the transport chain. The inner mitochondrial membrane is impermeable to protons. This means that as a result of the ...
AP Biology
AP Biology

... • Conservation biology • Textbook chapters: Chapter 50 pages 1106-1117, Chapters 52, 53, 54, 55 • Lab 12 Dissolved Oxygen ...
1 - Wsfcs
1 - Wsfcs

... 35. Different types of organisms are made of different numbers of cells. What is the range in the number of cells that organisms can be made of, from the very smallest organism to the very largest? A. From 1 cell to about 100 cells B. From 1 cell to many millions of cells C. From about 100 cells to ...
Introduction to Cancer Biology
Introduction to Cancer Biology

... DNA mutations result in defects in the regulatory circuits of a cell, which disrupt normal cell proliferation behaviour. However the complexity of this disease is not as simple at the cellular and molecular level. Individual cell behaviour is not autonomous, and it usually relies on external signals ...
Sarah M. Assmann - Personal.psu.edu
Sarah M. Assmann - Personal.psu.edu

... Mullen, MA, Assmann, SM, Bevilacqua, PC. 2012. Toward a digital gene response: RNA Gquadruplexes with fewer quartets fold with higher co-operativity. J. Am. Chem. Soc. 134: 812-815. doi: 10.1021/ja2096255. Li, J., Kinoshita, K., Pandey, S., Ng, C K-Y., Gygi, S.P., Shimazaki, K-I., and Assmann, S.M. ...
doc - Peace Corps Tanzania
doc - Peace Corps Tanzania

... Meningitis Causes - Microorganisms such as viruses, bacteria or fungi Transmission - Direct contact with an affected individual or sharing of utensils Symptoms - Swelling of the spinal and brain tissues Prevention - Vaccination, avoiding contact with infected individuals, use of preventive antibioti ...
Unit 1 Cells and System
Unit 1 Cells and System

... in our cells is called our metabolism. ...
Bio Frames - Lee County School District
Bio Frames - Lee County School District

... Define a problem based on a specific body of knowledge for example: biology, chemistry, physics, and earth/space science and do the following: (DOK High) (1) pose quesons about the natural world, (2) conduct systemic observa ons, (3) examine books and other sources of informa on to see what is already ...
Biology XI Support Material 2016
Biology XI Support Material 2016

... 1-Concentrate on minute points of the chapter keeping very short answer& short answer type questions in mind. 2- Emphasise on concepts. ...
Biology Class IX for SA-I 2016-17
Biology Class IX for SA-I 2016-17

... the cytoplasm. There are many cell organelles in a typical cell. Some of the main structures of a cell are as follows: The cytoplasm is the fluid content inside the plasma membrane. It also contains many specialised cell organelles. Each of these organelles performs a specific function for the cell. ...
Track 3
Track 3

... (2 marks) c. Which cell became plasmolysed? __________________________________________________________________________ (1 mark) d. Name one structure present in plant cells, which is absent in animal cells. ___________________________________________________________________________ (1 mark) e. Durin ...
Document
Document

... constant composition and the dynamic properties of the internal environment. The metabolism – the set of chemical reactions in living organisms that support them. Reproduction – the ability of organisms to reproduce themselves. ...
1 Living things - Macmillan English
1 Living things - Macmillan English

... up a living thing. We need a microscope to see cells because they’re very small. A microscope is an instrument which makes objects look many times bigger. Some living things, or organisms, have only one cell. These are unicellular organisms. Other organisms are made up of many cells and are called m ...
Now! - ambition classes
Now! - ambition classes

... studying human evolution are called anthropologists. Studies have revealed that human evolution started in Africa and earliest human type was Austaloplthecus Africanus. African ape man fossil was discovered by Prof. Raymond Dart fossil of skull of 5-6 years old baby from old pliocene rock of Tuang r ...
Functioning organisms
Functioning organisms

... from the parent plants. In order for sexual reproduction to occur, flowers must be pollinated and, when mature, form the fruit that releases seeds or attracts animals that will disperse the seeds for the plant. The organ systems and their functions relate back to the needs of individual plant cells. ...
Fluid dynamics of self-propelled microorganisms, from individuals to
Fluid dynamics of self-propelled microorganisms, from individuals to

... Stokes’ laws (Pozrikidis 1997). A key feature of these dynamics is that for an isolated swimmer the net propulsive force of the flagella must equal the opposing drag force of the body connected to the flagella, taking into account the effect of nearby surfaces or other organisms. While the creeping ...
Cell Biology - Educational Services
Cell Biology - Educational Services

... called eukaryotes. Animals, plants, fungi, and protists are eukaryotes. All multi-cellular organisms are eukaryotes. Eukaryotes may also be single-celled. Both prokaryotic and eukaryotic cells have structures in common. All cells have a plasma membrane, ribosomes, cytoplasm, and DNA. The plasma memb ...
Cell Biology - Hardin County Schools
Cell Biology - Hardin County Schools

... called eukaryotes. Animals, plants, fungi, and protists are eukaryotes. All multi-cellular organisms are eukaryotes. Eukaryotes may also be single-celled. Both prokaryotic and eukaryotic cells have structures in common. All cells have a plasma membrane, ribosomes, cytoplasm, and DNA. The plasma memb ...
File
File

...  Lysosomes. These are small membrane-bound vesicles formed from the RER containing a cocktail of digestive enzymes. They are used to break down unwanted chemicals, toxins, organelles or even whole cells, so that the materials may be recycled. They can also fuse with a feeding vacuole or a phagosome ...
Assignments Handbook - Independence High
Assignments Handbook - Independence High

... For each of the following experiments, identify the Independent Variable, the dependent variable, the control group, the experimental group(s), and any constants that might be present. 1. Alex is studying the effect of sunlight on plant growth. His hypothesis is that plants that are exposed to sunli ...
< 1 2 3 4 5 6 7 8 9 ... 90 >

Cell (biology)



The cell (from Latin cella, meaning ""small room"") is the basic structural, functional, and biological unit of all known living organisms. Cells are the smallest unit of life that can replicate independently, and are often called the ""building blocks of life"". The study of cells is called cell biology.Cells consist of cytoplasm enclosed within a membrane, which contains many biomolecules such as proteins and nucleic acids. Organisms can be classified as unicellular (consisting of a single cell; including bacteria) or multicellular (including plants and animals). While the number of cells in plants and animals varies from species to species, humans contain more than 10 trillion (1013) cells. Most plant and animal cells are visible only under the microscope, with dimensions between 1 and 100 micrometres.The cell was discovered by Robert Hooke in 1665, who named the biological unit for its resemblance to cells inhabited by Christian monks in a monastery. Cell theory, first developed in 1839 by Matthias Jakob Schleiden and Theodor Schwann, states that all organisms are composed of one or more cells, that cells are the fundamental unit of structure and function in all living organisms, that all cells come from preexisting cells, and that all cells contain the hereditary information necessary for regulating cell functions and for transmitting information to the next generation of cells. Cells emerged on Earth at least 3.5 billion years ago.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report