Diffusion is the gradual movement of particles from an area of high concentration to low concentration through a partially permeable membrane.
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What is osmosis?
Osmosis is the movement of water particles from an area of high concentration to low concentration through a partially permeable membrane
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Name 5 sub cellular structures in an animal cell
Nucleus, cytoplasm, mitochondria, ribosomes and cell membrane
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What are the genetic mutations of a sperm cell?
long tail and streamline body shape for aerodynamics, alot of mitochrondria to provide good amounts of energy and enzymes in its head to digest the egg cell membrane`.
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What is the calculation triangle for magnification?
IAM
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Are bacteria pro or eukaryotic
Prokayotic
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Name the 4 sub cellular structures in a bacterial cell
Cell membane, cell wall, cytoplasm and a single strand DNA loop. (May also contain plasmids)
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Genetic Mutations of nerve cells:
Long and have branched connections to cover a large area. Their function is to carry out electrical signals.
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Chloroplasts contains a pigment called (...)
Chlorophyll
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Why may people be opposed to the use of embryonic stem cells.
People may have religious objections,people also believe that it is immoral.
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Function of muscle cells:
To contract, they are long and pack with mitochondria to help with this.
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Phloem and Xylem cells: Which one's which?
Phloem transports food (glucose) and the xylem transports water and minerals.
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Function of root hair cells:
Are on the surface of plant roots, these longs protruding hairs provide a large surface area to absorb more minerals and water from the soil.
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What is active transport?
The movement of particles from an area of low concentration to high concentration through a partially permeable membrane.
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Name 3 Differences Between Plant And Animal Cells
Plants Have: A permanent vacuole, chloroplasts and a cell wall.
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Give two ways the villi in the small intestine are adapted for the absorption of digested food.
A very good blood supply to assist quick absorption and a large surface area to absorb more in less time.
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Name three adaptations of the leaf for the exchange of substances?
A flattened shape for a larger surface area, stomata to allow the exit of oxygen and entry of carbon dioxide and guard cells to open and close the stomata.
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Why do fish gills have a large surface area?
They can take more oxygen from the water.
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What does a bacterial cell NOT contain?
A true nucleus
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Name three substances that can diffuse through cell membranes, and two that cant.
Water, oxygen, carbon dioxide can. Starch, proteins and bone marrow cannot
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Give two ways embryonic stem cells can be used to cure disease.
They can replace faulty red blood cells and create new nerve cells for people suffering with paralysis.
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