1. Agriscience, Unit 20 Worksheet

2. `1. The process of increasing the number of species of a given plant is called:

4. 2. The propagation method where a stem is girdled, treated with a rooting hormone , and surrounded with damp sphagnum moss and plastic until new roots appear is called:

6. 3. A substance applied to stem cuttings to speed up the development of roots is:

8. 4. The male part of the flower is called the:

10. 5. The tendency of crossbred plants to be stronger and survive better than purebred plants is called:

12. 6. Crossbreeding two species of plants in the same genus with each another produces a:

14. 7. An exact duplication of a plant by asexual propagation is called a:

16. 8. When a seed coat is damaged to encourage germination, the process is called

18. 9. A disadvantage of plant tissue culture as a means of asexual propagation is:

20. 10. The part of the plant that is responsible for development of seed is the:

22. 11. A seed that is alive and capable of germination is said to be:

24. 12. Sexual reproduction in plants results in the production of:

26. 13. Which plants tend to be stronger and survive better than open-pollinated plants?

28. 14. Which type of stem cutting method is used when stock plant material is limited and the stems have alternate leaves?

30. 15. A cutting that is usually made from a large – leaf plant with the veins split is called:

32. 16. Which asexually propagation method is used to join parts of from two different plants to create a new plant?

34. 17. The propagation method where a plant is separated into smaller parts is:

37. Tissue culture may be used for:

39. 19. What are the advantages of asexual propagation?

41. 20. All seed plant propagation starts with:

43. 21. The purpose of petals in flowers is to attract:

45. 22. Food for the seed is stored in the:

47. 23. The three parts of a seed are:

49. 24. The female part of a flower is called the:

51. 25. Pollen is produced in the stamen by the:

53. 26. The male sex cells in a plant are found in:

55. 27. The purpose of a seed coat is to:

57. 28. Which propagation method uses very small actively growing plant parts and growing medium using test tubes under sterile conditions to produce thousands of plants:

59. 29. The most common type of grafting is:

61. 30. When you use a vegetative part or parts of a plant for reproducing a new plant it is called:

63. 31. A method of asexual propagation where the stem is encouraged to root while still attached to the parent plant is called:

65. 32. What is the only way to obtain new varieties and increase hybrid vigor of plants?

67. 33. All of the flower petals together are called the:

69. 34. What part of the flower supports the anther?

71. 35. Sexual reproduction occurs through:

73. 36. What is often less expensive and the quicker method to reproduce plants

75. 37. What vegetative plant parts can be used of a the parent plant to regenerate itself asexual?