Biology-GCSE

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  • Created by: TTani
  • Created on: 14-04-18 13:45
B1- what type of cells are a eukaryotic cell
Complex, animal and plant cell
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what type of cells are a prokaryotic cell?
Simple, bacteria cell
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what parts are in a plant cell that are not in an animal cell?
Cell wall, vacuole, chloroplasts
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what is the difference between light and electron microscopes?
Light- used to look at cells. Electron- show things in more detail
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How can you work out magnification?
Magnification= image size divided by real size
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The process by which cells become specialised?
Differentiation
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what are undifferentiated cells called?
Stem cells
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one example of specialised cells
Sperm cells take the male DNA to the egg- has tail which helps them swim
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what are chromosmes?
DNA molecules, control development of different characteristics e.g. eye colour
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How many pairs of chromosomes is there?
23 pairs
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what is mitosis?
It is used by multicellular organisms, to help grow and develop
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Stem cells found in human embyos are called?
Embryonic stem cells
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what do embryonic stem cells do?
Can be used to replace faulty cells in sick people
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what is diffusion?
Spreading of particles from a high to low concentration
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How does the surface area of a membrane affect the rate of diffusion?
The larger the surface area the faster the rate of diffusion
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what is osmosis?
The movement of water molecules across a partially permeable membrane from a less concentrated to a more concentrated solution
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What is active transport?
Substances absorbed are moved from a low to high concentration against the concentration gradient
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How does active transport help root hair cells take in minerals?
Allows the plant to absorb minerals from a very dilute solution in the soil
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Other cards in this set

Card 2

Front

what type of cells are a prokaryotic cell?

Back

Simple, bacteria cell

Card 3

Front

what parts are in a plant cell that are not in an animal cell?

Back

Preview of the front of card 3

Card 4

Front

what is the difference between light and electron microscopes?

Back

Preview of the front of card 4

Card 5

Front

How can you work out magnification?

Back

Preview of the front of card 5
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