Ch.4.1 Flashcards
All living things are made up of ________.
Cells
Living things that are made up of one cell only are called ______________ ____________
examples: _______________ and _____________
Unicellular organisms
Amoeba, bacteria
Living things that are made up of more than one cell are called ________________ __________
Example: the human body is made up of about ____________________________ cells
Multicellular organisms
100 trillion
The different types of cells in the human body have different ___________, _______________ and __________
Sizes shapes functions
__________ are the basic unit of living things.
Cells
Living things can be classified into two large groups: ____________ and ____________.
Animals, plants
Various types of animals cells have __________ ____________ ____________ __________________.
Some common basic features
Animal cells do/ don’t have a fixed shape as they ______________ __________ ______ ___________ ____________.
don’t have a cell wall
A plant cell is ____________ to an animal cell.
Similar
Most plant cells have a __________ __________ as it has a cell wall.
With a cell wall, the shapes of the plant cells are _________ _______ __________ ______ ___________.
Fixed shape
More or less the same
An animal cell consists of a _________ ____________, _______________ and a ________________.
Cell membrane, cytoplasm, nucleus
A plant cell consists of a ___________ _____________, _______________, a _____________, a ____________ ______________, a __________________ and some plant cells of green plants also contain ________________.
Cell membrane, cytoplasm, nucleus, cell wall, vacuole, chloroplasts
The cell membrane is a ____________ layer, which is also the ______________ layer of a cell.
It _________________________________________________________.
Thin, outermost
Controls the movement of substances into and out of the cell
The cytoplasm in a cell is ______________ the membrane. It is a ____________________ _______________.
It is ______________________________________________.
Inside
Jelly-like substance
The medium where chemical reactions take place
The nucleus is ________________ _________ the ______________________ of a cell.
It __________________________________________________.
Surrounded by the cytoplasm
Contains genetic materials which control the activities of the cell
The cell wall is _____________.
It ______________, _________________ and ____________ _____________ ______________________________________.
Rigid
Protects, supports, gives shape to a plant cell
The vacuole is ____________ and in the ________________.
It is a ____________________________________________ and ______________________________.
Large
Cytoplasm
Sac that contains a fluid that mainly consists of water
Stores dissolved minerals
The chloroplasts in a plant cell are found in ____________ ______________ _______________.
It is the __________________________________________________________________.
Some green plants
Site where photosynthesis takes place in order to make food
Both _____________ cells and _____________ cells have a __________________, a ____________ ________________ and ______________________.
In addition to these structure, _____________ cells also have a _____________ ___________, a large ______________. Some cells in ___________ ____________ also contain _____________________.
Animal, plant, nucleus, cell membrane, cytoplasm
Plant, cell wall, vacuole, green plants also contain chloroplasts
We can only observe cells that are _______________________________________ by using a ________________.
Too small to be seen with the naked eye
Microscope
A microscope can produce _______________ images of ____________ objects.
Magnified, small
The microscopes commonly used in the school laboratory are ______________ ______________.
They can magnify the image of an object up to _______________ ______________ _______________.
Light microscopes
Several hundred times
________________ __________________ are more powerful than those used in schools.
They can magnify the image of an object by up to _________________ _______________ _______________.
They are usually used in the ________________ ______________.
Electron microscopes
Several million times
Research laboratory