Agriscience, Unit 20 Worksheet

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

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:

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Tissue culture may be used for:

19. What are the advantages of asexual propagation?

20. All seed plant propagation starts with:

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

22. Food for the seed is stored in the:

23. The three parts of a seed are:

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

25. Pollen is produced in the stamen by the:

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

27. The purpose of a seed coat is to:

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:

29. The most common type of grafting is:

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

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

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

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

34. What part of the flower supports the anther?

35. Sexual reproduction occurs through:

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

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