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B3.1 Growth and Differentiation (Y9)
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score predictions for saturday?
3-1
what is a non-cancerous tumour called?
benign
what is a cancerous tumour called?
malignant
how are adult stem cells obtained
drilled from bone marrow
name the 2 types of stem cells
adult and embryonic
what does ethical mean?
whether something is morally right or wrong
What is osmosis?
The movement of water from a high to low concentration across a partially permeable membrane
Define aseptic technique.
Creating a sterile environment to avoid contamination
How many cells do bacterial cells divide into after 1 division?
2
State the formula for magnification.
magnification = image size /actual size
Describe what happens to the mass of a potato if left in a high sugar solution.
shrinks (water moves out)
Define active transport
The movement of particles from a low to high concentration AGAINST the gradient. Requires energy.
How do you calculate percentage change?
(change in mass / initial mass) x 100
Where are embryonic stem cells obtained (taken) from?
fertilised egg cell
What is the difference between prokaryotic and eukaryotic cells?
eukaryotes have a nucleus
how does temperature affect diffusion?
high temp = particles have more energy to move around
name 1 factor that increases the rate of diffusion.
temperature
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