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14 Cards in this Set
- Front
- Back
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What are stem cells and What are their uses? |
stem cells are unspecialised cells found in humans
They can be used for growth and repair |
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How do unspecialised cells like meristems and stem cells become specialised? |
Gene activity |
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What does the cerebrum control ? |
Memory, personality, conscious thought |
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What does the medulla control? |
Balance |
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What are the three main types of nerves ( neurones ) |
Sensory - connects senses to brain
Rely- passed messages from sensory to motor
Motor- connected to muscles to bring about movement |
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What happens if blood sugar increses above normal ? |
Glucose ------ glycogen .................^................... ............Insulin.............. |
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what happens when blood sugar decreases above normal? |
Glycogen ------- glucose ...................^.................. ............glucagon......... |
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What is a zygote? |
Fuzed male and female gametes |
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Where are the male sex cells in a plant? |
Anthers |
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What are the male sex cells in a plant ? |
Pollen |
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What is discrete variation? |
Something that the organisms either has or not - can be observed |
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What is continuous variation? |
it constantly changes and is an example of polygenic inheritance - can be measured |
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Why are genetic crosses sometimes incorrect? |
Because fertilisation is random |
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What is transpirtation? |
Loss of water from the leaves of a plant ( through pores called stomata ) |
