Name: Stem Cells and Differentiation
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Question 1 of 14

Question 1
Use some of the following words to fill in the blanks. You can use each word more than once.

Growth, division, mass, weight, size, number
- - Organisms get larger through the process of . Organisms grow by increasing the and of their cells.
  - The of cells an organism has increases through cell .
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Question 2 of 14

Question 2
What kind of chart do we use to measure human babies’ growth over time?
- A bar chart
- A pie chart
- A percentile chart
- A line chart
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Question 3 of 14

Question 3
As organisms grow, their cells need to become more specialised. This is so these new cells can perform their new roles. Which of the following is the process of making cells more specialised?
- Differentiation
- Speciation
- Gravitation
- Nucleation
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Question 4 of 14

Question 4
The image shows a chart used to monitor a human baby’s growth over time.
- As a baby grows, we measure their and at regular intervals. We can then plot the results on a chart like the one above. The curved lines represent , these can tell us how the baby’s growth compares to the rest of the . For example, if the measurements of a baby are below the 25th line, it means their growth is in the 25% of the population.
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Use some of the following words to fill in the blanks:

Population, percentiles, weight, length, mass, bars, top, bottom
Question 5 of 14

Question 5
What does it mean to be in the 75th percentile? For example, you could be in the 75th percentile for your ability at a board game like chess.
- You are in the top 25% of the population
- You are in the bottom 25% of the population
- You are between the top 25 and the bottom 25% of the population
- You are in the top 1% of the population
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Question 6 of 14

Question 6
During the process of cell differentiation, which of the following may happen?
- Cells become more specialised
- Cells become less specialised
- The amount of sub-cellular structures will change to suit the purpose of the new cell
- The type of sub-cellular structures will change to suit the purpose of the new cell
- The shape of the cell will change
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Question 7 of 14

Question 7
Marigolds, septioids, meristems, endocrines
- Complete the sentence: Groups of cells in rapidly growing parts of plants, such as the roots and shoots have a special ability to turn into any kind of cell. These groups of cells are called .
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Use one of the following words:

Omnipotent cells

Meristems

Palisade

Xylem
Question 8 of 14

Question 8
Animal, plant, bacteria, early, late
- Complete the following statement:
  
  Most types of cell differentiate at an stage, whereas, many types of cells retain the ability to differentiate throughout life.
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Question 9 of 14

Question 9
Plants grow by doing which two processes?
- Cell elongation – cells get longer
- Mitosis – replicating cells
- Cell massivication – cells grow in mass
- Meiosis – replicating cells
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Question 10 of 14

Question 10
What are stem cells?
- Cells that are able to continuously divide and then specialise into other kinds of cells
- Cells that cannot continuously divide but can specialise into other kinds of cells
- Cells that are fully specialised and can only divide to produce similar cells
- Cells that have become old and need to be replaced
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Question 11 of 14

Question 11
There are two broad types of stem cells. Which of the following is the correct statement?
- Embryonic stem cells can divide to produce any kind of cell, whereas, adult stem cells can only produce similar cells to those around them
- Stem cells in adults can divide to produce any kind of cell, whereas, stem cells in embryos can only produce similar cells to those around them
- Stem cells in adults can divide to produce any kind of cell, but in children, stem cells can only produce red blood cells
- Adults stem cells cannot produce new organs, whereas, child stem cells can produce new organs
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Question 12 of 14

Question 12
Choose the statement which accurately describes the abilities of plant stem cells.
- Plant stem cells can only produce two kinds of cells, xylem and phloem
- Plant stem cells can usually only produce xylem and phloem, except when temperatures reach 30˚C, above this temperature they can produce any kind of cell
- Plant stem cells can always produce any kind of cell
- Plant stem cells always divide to produce cancer cells
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Question 13 of 14

Question 13
Malaria, paralysis, diabetes, cholera
- Treatment with stem cells may be able to help conditions where we have damaged cells, e.g. and .
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Question 14 of 14

Question 14
There are some risks to using stem cells for treating human disease. Which of the following issues can arise during stem cell therapy?
- Continued division of cells leading to cancer
- When stem cells are introduced from another person the immune system can destroy them (rejection)
- Stem cells are too effective and cause unexpected improvements in other areas, this leads to an unfair advantage in life for those receiving treatments
- Stem cells can turn into viruses
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Stem Cells and Differentiation

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