Across
- 3. the standard instrument for measurement in the scientific laboratory
- 6. microscopic pores on the surface of leaves and some stems of most higher plants that regulate gas exchange between the plant and its environment
- 8. multiple organs that work together to perform major functions in the body
- 9. chemical compounds used to colour parts of the cell to study the detailed structure
- 10. any change in an environment that causes an organism to react
- 11. the body's ability to destroy pathogens before they cause disease
- 12. storage sacs within the cytoplasm of a cell that may contain either wastes or useful materials, such as water or food
- 13. a hormone that prompts glucose to move from the blood into body cells resulting in blood sugar down
- 15. any microscopic organism
- 16. a group of specialized cells that perform a specific function
- 18. a c-shaped pad of cartilage in the knee that acts as a shock absorber
- 19. ecological succession in which plants and animals first colonize a barren, lifeless habitat
- 22. the process of choosing a few organisms with desirable traits to serve as the parents of the next generation
Down
- 1. an endocrine organ that secretes insulin
- 2. a chemical compound that contains a carbon–hydrogen or carbon–carbon bond
- 4. additional mixing of genetic material from a sperm and egg which results in a unique combination of genes
- 5. the amount of space occupied by matter
- 7. to copy
- 8. any information that can be seen with any of the senses
- 14. a conclusion/deduction based on observations
- 17. a life process that involves combining simple substances into more complex substances
- 20. a subcellular structure that has one or more specific jobs to perform in the cell
- 21. a hormone associated with sexual development and the reproductive system