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Are animal cells often regular shape?
No
Are animal cells often regular in shape ?
No, they are often irregular in shape.
Are plant cells often regular in shape ?
Yes
In what part of the nucleus is the genetic information of the organism kept ?
In the chromosomes.
In what way does the nucleus help the cell ?
The nucleus helps the cell make the right sorts of proteins.
What is a nucleus?
A nucleus is where all the genetic of organism is kept.
What is a substance found in chloroplasts that is similar to starch, but that is not starch and is pressent in animals?
Glycogen
What is the function of chlorophyll?
Chlorophyll absorbs energy from the sunlight to be used by the plant to make food.
What two parts of the cells are found in plant cells but not animal cells ?
1- cell wall & 2- chloroplasts
What are animal vesicles made of ?
Water or nutrients.
What are animal ‘vacuoles’ called ?
Vesicles
Are plant vacuoles or animal vesicles bigger ?
Plant vacuoles are much bigger.
How does a vacuole help a plant cell to be kept in shape ?
The vacuole presses outward on the rest of the cell (and helps it to stay in shape)
What is the cell sap in a plant cell made of?
Sugars and order substances. (Cell sap is a solution made of sugars and other substances)
What is that solution which surrounds the vacuoles in a plant cell called?
Cell sap
What is a vacuole surrounded by a plant cell ?
By a membrane.
In which part of the cell do metabolic reactions occur/take place?
In the cytoplasm.
What is the percentage of water in cells ?
70%
Are cell walls fully permeable or not permeable ?
Cell walls are fully permeable; because of the spaces between fibers of crisscrossed cellulose which allows even larger molecules to go through.
Why are cell walls important?
It stops the cell from bursting if it absorbs a lot of water.
Do animals have a cell wall?
No
What is a cell wall made of ?
Cellulose
Is the cell membrane permeable or partially permeable?
Partially permeable (it is a very thin layer)
Are cell membranes present in all organisms ?
Yes
What is the cell membrane made out of?
Protein and fat
What is the formula for magnification ?
Magnification = size in drawing or photograph / size of the real object
Up to how much can an electron microscope magnify?
An electron microscope is able to magnify up to 10 million times. (x10 million)
How many times can a good light microscope magnify ?
A very good light microscope can magnify up to 1500 times(x1500).
Name the two types of microscopes.
1- light microscope. 2- electron microscope
What is a word for an organism with only one cell ?
Unicellular
Name the 7 characteristics of living organisms. Briefly explain them.
1- movement. 2- respiration. 3- sensitivity. 4- growth. 5- reproduction. 6- excretion. 7- nutrition.


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