7  Where bones meet. (6)

 8  Large flatfish. (6)

 9  Shape. (4)

10 Living thing. (8)

11 Half the usual number of chromosomes (like 13 across). (7)

13 Male gamete. (5)

15 Spiral. (5)

16 Female gonads. (7)

18 Taxonomy ranking between genus and species. (8)

19 Job. (4)

21 Flashing light. (6)

22 Stringed instrument. (6)

 2  Large group of heterotrophic, multicellular eukaryotes. (6,7)

 3  The movement of water across a semi-permeable membrane. (7)

 4  Part of a microscope upon which is placed the glass slide. (5)

 5  Movement of water through a plant enabled by the evaporation from the leaves. (13)

 6  What you do to energy when it changes and to matter when it reacts. (8)

12 Enough. (8)

14 Hard to pin down. (7)

17 Patellae. (5)

20 Epidermis. (4)