Biology

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Are human cells the same as animal cells?
Most human cells are like animal cells and contain a nucleus, cell membrane, mitochondria and ribosomes
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How do plant and algal cells differ from animal cells?
Plant and algal cells contain all the structures of animal cells as well as a cell wall. Many plant cells also contain chloroplasts and a permanant vacuole containing sap.
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What are bacterial cells like?
It consists of a cytoplasm and a membrane surrounded by a cell wall
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How are yeast cells different to bacterial, plant and animal cells?
Yeast is a single celled organism. Each cell has a nucleus, cytoplasm and a membrane surrounded by a cell wall.
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What different types of cells are there?
Cells are specialised to carry out a specific function.
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How is the structure of a specialised cell related to its function?
Examples of specialised cells are fat cells, cone cells, root hair cells and sperm cells.
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What is diffusion?
The net movement of particles from an area where they are at high concentration, to an area where there is a lower concentration.
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What affects the rate of diffusion?
The greater the difference in concentration, the faster the rate of diffusion.
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What is a tissue?
A group of cells with similar structure and function.
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What is an organ?
Organs are made of tissues. One organ may contain several types of tissues.
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What are organ systems?
A group of organs that perform a particular function.
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What organs form the digestive system?
The digestive system is an example of a system where substances are exchanged with the environment.
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What are plant organs?
They include stems, roots and leaves.
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What is photosynthesis?
carbon dioxide + water ----> glucose + oxygen
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Where does the energy come from for photosynthesis and how do plants absorb it?
Light energy is absorbed by chlorophyll in the chloroplasts of the green parts of the plant. It is used to convert carbon dioxide and water into sugar (glucose). Oxygen is released as a by-product.
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What factors limit the rate of photosynthesis?
Shortage of light, low temperature and a shortage of carbon dioxide.
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How can we use what we know about limiting factors to grow more food?
We can manipulate the levels of light, temperature and carbon dioxide artificially to increase the rate of photosynthesis.
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How can we control the environment in which plants are grown?
The environment can be artificially controlled to make sure these factors limit growth, which has a number of benefits.
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What factors affect the distribution of organisms in their natural environment?
Temperature, nutrients, the amount of light, the availability of water, the availability of oxygen and carbon dioxide.
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How can you measure the distribution of organisms in their natural environment?
You can use a quadrat or a transect.
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Other cards in this set

Card 2

Front

How do plant and algal cells differ from animal cells?

Back

Plant and algal cells contain all the structures of animal cells as well as a cell wall. Many plant cells also contain chloroplasts and a permanant vacuole containing sap.

Card 3

Front

What are bacterial cells like?

Back

Preview of the front of card 3

Card 4

Front

How are yeast cells different to bacterial, plant and animal cells?

Back

Preview of the front of card 4

Card 5

Front

What different types of cells are there?

Back

Preview of the front of card 5
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