1) It is possible to reactivate inactive genes in the nucleus of a body cell to form cells of all tissue types. a) True b) False 2) Which cells have the potential to produce cells needed to replace damaged tissues? a) embryonic & adult stem cells b) just embryonic stem cells c) just adult stem cells d) neither of the above 3) Some plant cells remain specialised and can develop into any type of plant cell. a) True b) False 4) Plant meristems divide to produce cells that result in ..................... a) increased height b) increased length of roots c) increased girth of plant d) all three of the above 5) Cut stems from a plant can develop roots in the presence of plant hormones called ............ a) akin b) allkin c) auxin d) xylem 6) What tissues can Unspecialised plant cells can develop into? a) xylem & phlegm b) plant organs c) cell walls d) xylem & phloem 7) Upto what cell stage are all the cells identical in a human? a) 10 cell stage b) 9 cell stage c) 18 cell stage d) 8 cell stage e) 80 cell stage 8) After the 8 cell stage in humans, the cells become .......... a) mutated b) all identical c) specialised 9) Some cells in a plant remain unspecialised cells which means that you can form ....... a) animal cells b) clones c) neither of the above 10) In animals, some cells remain unspecialised a) True b) False

B5 stem cells

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