Across
- 1. type of leaf that has only one blade attached to the petiole
- 5. considered the "master gland"
- 7. the tough membrane that encloses the heart
- 9. a sensible explanation to a scientific problem
- 10. the hormones released by the islets of langerhans to regulate sugar levels in the body are ______ and glucagon
- 11. a distinct type of organism
- 14. controls balance and muscle coordination
- 16. the organ where bile is stored
- 18. refers to animals in an environment
- 21. the largest vessels that carry blood away from the heart
- 22. the process by which life continues through a new generation of organisms
- 23. a young plant that is no longer dependent on its cotyledons
- 24. the process by which plants manufacture their food
- 26. group of cells designed to work together as a unit
- 27. this system provides movement for the body
- 28. the brain & spinal cord are part of the _______ nervous system
- 29. This controls simple reflexes
- 30. the creeping stem that runs along the soil surface
- 40. this scientist developed the scientific method
- 41. a plant with flowerheads consisting of disk & ray flowers is from this family
- 44. the tissue used by the body to conduct impulses is the ______tissue
- 46. muscles that work without conscious thought
- 49. blood enters the upper chambers of the heart which is called the ______.
- 50. a ripened flower ovary
- 51. plant tissues that carry food downward to the stems and roots
- 54. the methodical testing of scientific ideas
- 56. this system supports the body and protects vital organs
- 59. the scattering of seeds by wind, water or people is ___ dispersal
- 60. branch of biology that studies the relationships between organisms in their environments
- 61. grains are the fruits of plants from this family
- 63. the process that water in the soil enters a root's root hairs
Down
- 2. the primary pigment that causes skin color
- 3. this system controls other body systems
- 4. this system transports nutrients and oxygen to cells and carries waste from cells
- 5. The structure that exchanges oxygen and nutrients between the blood of an unborn child and his mother?
- 6. the main divisions of the skeleton are the axial skeleton and the _______ skeleton
- 8. the first section of the small intestine
- 12. the early growth of a seed
- 13. plants that live many growing seasons
- 15. the root system develops from the ____ of the seed
- 17. this system covers and protects the body
- 19. the uniting of a sperm cell and an egg cell
- 20. cells that carry oxygen through the blood
- 21. pollination is the transfer of pollen from the ______ to the stigma
- 25. a white blood cell that matures in the thymus
- 31. the science of classification
- 32. a scientific idea that has survived testing & was never proven false
- 33. what type of symmetry does an organism that can be cut into equal halves in only one direction have?
- 34. the path that food follows through the digestive track is the ______ canal
- 35. the scientific name for the windpipe
- 36. joints that give the shoulders and hips their wide range of motion
- 37. the air sacs in the lungs
- 38. this system concentrates and removes liquid waste
- 39. the largest lymphatic organ
- 42. the plant family that helps restore nitrogen to he soil
- 43. the structure that connects bones to muscles
- 45. a properly designed experiment should have ___ independent variables
- 47. an organism's home within the environment
- 48. portion of the body that contains most vital organs
- 52. the sum of all chemical processes of life
- 53. a dome-shaped muscle that aids in breathing
- 55. scientific term for a flowering plant
- 57. connect the kidneys to the bladder
- 58. parallel veins, petals in multiples of 3, and a fibrous root system are all characteristics of ______.
- 62. the study of reasoning
- 64. in science, anything that is used as a partial representation of something else.