crossword

2. A type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth.
6. Organelles that store water and other substances required by the cell.
7. Outer covering of a cell that provides strength and support found only in plant cells.
8. Structures in cells that perform a certain function.
12. Made of just one cell.
14. Organelles that convert energy the cell receives into a form it can use.
16. A thing or event that evokes a specific functional reaction in an organ or tissue.
17. An organelle that directs all the activities in a cell.

1. A type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell, as in the production of gametes and plant spores.
3. Any change in an organism-environment.
4. Physical characteristic or behaviour of a species that increases the species chances of survival in a particular environment.
5. The basic unit of life.
7. Organelles that convert sunlight into food found only in some plant cells.
9. Made of more than one cell.
10. A tree does this when a seed falls off.
11. The thin structure that encloses all the contents of plant and animal cells has tiny openings that allows particles of some substances, but not others to pass through.
13. Living things that have cells.
15. Diffusion of water through a selectively permeable membrane.