Compare the characteristic features of the domains Eukarya and Bacteria.

Mark scheme

Marking points from the official mark scheme (Feb/Mar 2021). The mark or mark type is shown in brackets.

1. [1] Eukarya v Bacteria
2. [1] nucleus v no, nucleus / nuclear envelope;
3. [1] linear DNA v circular DNA / plasmid;
4. [1] histone proteins associated with DNA v no histone proteins;
5. [1] (double) membrane-bound organelles v no membrane-bound organelles ; ignore named organelles
6. [1] 80S ribosomes v 70S ribosomes ;
7. [1] cell wall sometimes present v cell wall always present;
8. [1] cell wall (if present) made of cellulose / chitin v cell wall made of peptidoglycans ;
9. [1] cells divide by mitosis v cells divide by binary fission ; I ref. to meiosis
10. [1] (can be) multicellular v unicellular;
11. [1] AVP; e.g. differences in flagellum structure
12. [1] botanic gardens ;
13. [1] research;
14. [1] controlled named growing conditions ; e.g. light / water / nutrients / temperature
15. [1] propagation / named method ; e.g. cuttings / tissue culture / controlled pollination
16. [1] plant back to natural environment;
17. [1] seed banks / collect seeds ;
18. [1] detail of seed storage ; e.g. low oxygen / low moisture / low temperature
19. [1] seeds regularly, tested for viability / re-stocked; A description
20. [1] maintain genetic diversity / genetic material preserved / acts as a gene bank ;
21. [1] can be germinated prior to introduction back into natural habitat ;
22. [1] ref. to CITES ;
23. [1] ref. to (conservation) projects in situ / named example ; e.g. remove alien species / forestry project