Across
- 3. Acids The small molecules that are joined in long chains to make protiens. All the protiens in living things are made from 20 _____/_____ joined in different orders.
- 4. A protien that catalyses chemical reactions in living things.
- 5. a new cell or individual. a _____ has the same genes as the parents
- 9. Cell division that halves the number of chromosomes to produce gametes. The four new cells are genetically different from each other and from the parent cell.
- 11. An organelle in animal and plant cells where respiration takes place.
- 12. Part of a plant or animal made up of different tissues.
- 13. cells Un specialised cells in plamts that can develop into any kind of specialised cell.
- 15. Helix The shape of a DNA molecule, with two strands twisted together in a spiral.
- 16. Group of specialised cells of the type working together to do a particular job.
Down
- 1. The bending of growing plant shoots towards the light.
- 2. this is how an animal or organism matures. As a zygote developes, it forms more and more cells. These are organised into different tissues and organs.
- 6. Plant tissue transports water through a plant .
- 7. A plant hormone that affes=cts plant growth and development. For example, _____ stimulates growth of roots in cuttings.
- 8. A section of DNA giving the instructions for a cell about how to make one kind of protien.
- 10. Cloning Growing new tissues and organs from cloning embryonic stem cells. The new tissues and organs are used to treat people who are injured or ill.
- 14. A developing human embryo is referred to as a _____ once it reaches eight weeks after fertilization. A _____ already has all the main organs that it will have at birth.