Multicellular organisms grow by increasing the number of cells they have. This relies on the processes of cell division and differentiation.
Which of these processes happens during mitosis?
The cell grows larger
The numbers of organelles increase
The nucleus divides
How many new cells are produced during meiosis?
What does haploid mean?
The cell has two copies of every chromosome
The cell has one copy of every chromosome
The cell has all of its chromosomes in pairs
Which of these processes is mitosis NOT used for?
Repair of tissues
Where in plants are meristems found?
Leaves and root tips
Root tips and petals
Root tips and shoots
Which of these contains plant gametes?
What is an embryonic stem cell?
A cell found in the embryo that can differentiate into any type of cell
A cell in a meristem that can differentiate into any type of cell
A cell in an adult that can differentiate into any type of cell
Why might someone NOT support the use of embryonic stem cells in scientific research?
The research could help find cures for diseases
The embryos have to be destroyed to extract the stem cells
Embryonic stem cells cannot be extracted from embryos
Why would it be beneficial to use your own stem cells to treat a disease you may have?
Your immune system won't reject the stem cells
It is easier than finding a stem cell donor
There is lots of evidence to support this method of treatment
Which statement about the ability of cells to specialise is correct?
Plant and animal cells never lose the ability to specialise
Most plant cells lose it at an early stage but animal cells do not
Most animal cells lose it at an early age but plant cells do not