Put one tick in each row of the table to show which cells are haploid and which are diploid (2)
H,H,D,D,D
Which type of cell division happens to the zygote to form the embryo? (1)
mitosis
What is meant by cell differentiation? (1)
cells become specialised
Have the girls and boys stopped growing in height after 20 years? (2)
girls – (yes) because graph has levelled off / stopped growing at 17/18, boys – (no) because graph has not levelled off / is still rising
Write down two types of protein that do different jobs and describe the job of each protein during growth (4)
structural proteins-build new tissue / named tissue e.g. skin
hormones-control growth / control body processes / control named process e.g. puberty
carrier molecules / eg haemoglobin-transport materials (needed for growth)
enzymes / catalysts-control chemical reactions (involved in growth)
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