Biology · May / June 2021 · Paper 41 · Question 5

lumen or wall of left or right oviduct labelled Q ;

area of uterus with darkest shading labelled R ;

ovary labelled S ;

vagina labelled T ;

any three from:

ref. to making new cells after fertilisation ;

making membranes ;

(protein for) making enzymes ;

making new, (named) cell structures / cytoplasm ;

(fat / protein) provide / source of, energy ;

energy for, cell division / mitosis / growth (of cell) / metabolism / AW ;

any two from:

hardens / changes, after fertilisation / entry of sperm ;

prevents more sperm entering ;

AVP ;

any four from:

chromosomes / DNA, duplicate(s) / replicate(s) ;

chromosomes separate ;

mitosis / nuclear division ;

(zygote / fertilised egg) divides / splits (into two) ;

(nuclear / cell) division / mitosis, repeated / AW ;

forming a, ball / cluster, of cells ;

cells are genetically identical ;

AVP ; e.g. cell, specialisation / differentiation / ref. to stem cells