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19225053
Cell division B2 biology aqa
Descripción
GCSE Biology Mapa Mental sobre Cell division B2 biology aqa, creado por Millie Jones el 06/09/2019.
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biology
gcse
Mapa Mental por
Millie Jones
, actualizado hace más de 1 año
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Creado por
Millie Jones
hace más de 4 años
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Resumen del Recurso
Cell division B2 biology aqa
cell division
the cell cycle
call division is necessary for the grown and development of new cells
cells grown and replicate their DNA so theres two sets
chromosomes are pulled to opposite sides of cell
cell membrane and cytoplasm divide creating two cells
there are 23 pairs of chromosomes in human cells
growth and differentiation
multicellular organisms do not contain one type of cell, over time the each differentiate
in early development unspecialised cells are called stem cells
plant cells can differentiate throughout their life, actively dividing ones are called meristems
difficult to clone because once they have differentiated they are like that until they die
stem cells
found in human embryo and adult bone marrow
egg and sperm fuse to form a zygote, it divides to form an embryo
adult stem cells can differentiate into other cells ie. blood cells
they can be used to cure conditions such as:
paralysis (new nerve cells)
diabetes (new cells that will accept/produce insulin)
stem cell dilemmas
some people believe its a violation of the embryos rights
we should not interfere in the natural process of reproduction
its difficult to 'persuade' the cells to differentiate
because they divide rapidly theres s concern that the could cause cancer
cells from same person have less chance of being rejected
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