Cells 1
Terms
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- cell
- A cell is th basic unit of structure and basic unit of structure in an organism
-
all liveing things have
(6) -
Cellular organization
Contain simular chemicals
use energy grow and devolp
resond to their surrounding
Reproduce - resolution
- the ability to clearly distinguish the indevidual parts of an object
- magnification
- is the ability to make things look larger than the seem
- cell theory
-
a widely acceped explaination of the relationship between cells and all living things
the cell theory states:
1. All living things are composed of cells .
2.Cells are the basic unit of structure and function in all living things.
3. All cells are are produced from other cells - Rudolf Virchow
- proposed that new cells are formed only from existing cells "all cells come from cells"
- compound microscope
- A light microscope that has more than one lens
- microscope
- is an instrument that makes small objects looks larger
- microscope made it possible
- for people to and learn and discover cells
- development
- is the process of of change that occers during an organism's life to produce a more complex organism
- multicellular
- organisms are composed of many cells
- unicellular
- single celled organisms, include the most numerous organisms on Earth
- organisms
- Living Things
- convex lens
- a lens with a curved shape.
- Anton van Leeuwenhoek
- observed tiny organismswith microscopes. he saw one celled organisms, which he called called animalcules- meaning little animals. ALso the first person to see the tiny singled celled organisms called bacteria.
- Mattias Schleiden
- Concluded that all plant s are made of cells
- Theodor Schwann
- Conduded that all animals are made of cells
- Robert Hooke
- He is one of the first people to observe cells. In 1663 he observed the structure of a thin slice of cork.
- Stimulus
- A change in an organism's surrounding that causes the organism to react
- Response
- An action or change in behavoir
- Reroduce
- produce offspring that are simular to the parents
- Spontaneous Generation
- The mistaken idea that living things arise fom nonliveing souces.
- Contolled Experiment
- A Scientist carries out two tests that are idendical in every respect except for one factor.
- Francesco Redi
- He Designed a controlled experiment to show that flies do not spontaneouly arise4 from decaying meat involveing meat
- Louis Pasteur
- He Finally Designed some controlled experiments that finnally disproved spontanious generation involeing broth
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Basic needs of living things
(4) -
Energy
Water
Living space
Stable Internal conditions - Autotrphs
- Organisms that make thier own food
- Heterotrophs
- Organisms that cannot make their own food
- Homeostasis
- The maintenance of stable interal conditions despite changes in the surroundings
- Organelles
- Tiny cell stuctures that carry out specific functions within a cell
- Vacuoles
- a sack that is the storege of a cell
- Lysosomes
- are small round structures that containchemicals that break down large food particles into smaller ones
- prokaryotes
- organisms whose cells lack a nuclues
- eukaryotes
- Organisms whose cells contian a nuclues and many of the organelles
- nerve cells
- carry mesages through out the body