Across
- 2. green pigment that traps sunlight for photosynthesis
- 3. membrane-bound sacs which contain water and dissolved food substances such as sugar, mineral salts and amino acids
- 5. formed during photosynthesis and converted to starch for storage in plants
- 12. the cell wall gives plant cells a ___ shape
- 13. organelles in green parts of plants which contain chlorophyll
- 14. without the cell membrane, a cell will not be able to ___ substances entering or leaving the cell
- 16. made up of one cell
- 19. controls the movement of substances in and out of the cell
- 20. a plant cell wall is made up of this
Down
- 1. ___ of labour is demonstrated by different types of cells each performing specific functions to enable the organism to survive more effectively
- 2. jelly-like substance, comprising mainly water, where chemical reactions in a cell take place
- 4. without the nucleus, a cell will have ___ life span
- 6. contain DNA which determine the inherited characteristics of an organism
- 7. animal cells have ___ and numerous vacuoles
- 8. an ___ cell does not have a cell wall nor chloroplasts
- 9. plant cells have one or two ___, central vacuoles
- 10. without the nucleus, a cell will not be able to ___ and carry out its specialised function
- 11. the cell membrane is a thin, ___ permeable membrane
- 14. the basic unit of all living things
- 15. in a multicellular organism, ___ cells have ___ functions and work together to keep the organism alive
- 17. contains chromosomes and controls all activities that take place in the cell
- 18. a plant cell wall is ___ permeable
- 21. a cell needs ___ to carry out activities such as growth, reproduction, repair
