CONTENT

  • Meaning of Life Cycle
  • Annual Crops
  • Examples of Annual Crops
    CLASSIFICATION OF BASED ON ITS LIFE CYCLE
    LIFE CYCLE OF A CROP

    Lifecycle of a crop is the number of years it will take the crop to germinate, mature, flower, produce
    seeds and die. Crops can be classified into three classes on the basis of their life cycle, the classes
    are:
    (A) annual
    (B) biennial
    (C) perennial
    Annual Crops: Annual crops are the crops that grow and complete their lifecycle within one year. They
    germinate, mature, flower, produce seeds and die within one year. Examples of annual crops are
    cotton, maize, cowpea and millet.
    Biennial Crops: Biennial crops are crops that take two years to complete their life cycle. In the first
    year, they produce leaves and branches, in the second year, they produce and store food, flower have
    fruits and then die. Example of biennial crops are; cassava, onion, carrot and cocoyam.
    Perennial Crops: Perennial crops are crops that take more than two years to complete their life cycle.
    Example of perennial crops are; mango, cocoa, pawpaw, oil palm, rubber etc.
    EVALUATION
  1. What is meant by life cycle of a crop?
  2. list the various classes of crops based on their life cycle.
    CLASSIFICATION OF CROPS BASED ON MORPHOLOGY
    There are two broad classes of crops based on what they look like (morphology). They are
  3. Monocotyledons and
  4. Dicotyledons
    MONOCOTYLEDONS
    Monocotyledons are plants that have seeds which possess just one cotyledon each or one seed leaf,
    example of monocotyledons are palms, cereal e.g. rice, millet, guinea corn, maize , oil palm etc,
    CHARACTERISTICS OF MONOCOT
  5. They have fibrous roots i.e. the roots are almost of the same size.
  6. They have long slender hollow stem which bear few or no branches.
  7. The stems are soft, that is they lack cambium tissue, a layer which is responsible for the
    thickening of stem in dicotyledons.
  8. The leaves are long and narrow.
  9. The leaves have parallel veins, that is main veins which are parallel to one another.
  10. They have one seed leaf.
    EVALUATION
  11. What are monocotyledons plants?
  12. State five examples of monocots.
  13. Draw a monocot plant and label.
    DICOTYLEDON PLANTS
    Dicotyledons are plants that have seeds with two cotyledons each or two seed leaves. When the
    seeds split open, they give two parts. These are cotyledons. Examples of dicotyledons are
    cowpea, soyabean, cotton, groundnut, orange, mango, tomato, waterleaf etc.
    CHARACTERISTICS OF DICOT PLANT
  14. They have tap root.
  15. They have a main stem bearing several branches.
  16. They have cambium tissue in their stem.
  17. Their leaves are short and broad.
  18. Leaves have net venation.
  19. They have two seedleaves
  20. They have leaves with petioles or stalks.
  21. Their flowers have either five or multiple of five parts.
    EVALUATION
  22. What is dicot?
  23. List five example of a dicotyledon plant.
  24. Mention three characteristics of dicotyledon plants.
    DIFFERENCES BETWEEN MONOCOT AND DICOT PLANTS
    MONOCOTYLEDONOUS PLANTS DICOTYLEDONOUS PLANTS
  25. They have one seed leaf they have two seed leaves
    2.Their leaves have parallel veins they leaves have net venation
    3.They have fibrous root system they have tap root system
  26. The leaves have smooth margin their leaves are with rough or serrated margins
  27. They have hollow stems with no they have cambium tissue in their stem.
    Cambium tissue.
  28. They have long slender leaves. theirleaves are short and broad.
    GENERAL EVALUATION AND REVISION QUESTIONS
  29. What are monocot plants?
  30. What are dicot plants?
  31. Give five examples of monocot plants.
  32. Give five examples of dicot plants.
  33. In tabular form, distinguish between monocot and dicot plants.
    READING ASSIGNMENT
    Junior Secondary Agriculture for Nigerian Schools by A. Yondeowei Bk. 1. Chapter 3, pages 23.
    WEEKEND ASSIGNMENT
  34. Dicotyledonous plants have _ (a) One cotyledons (b) two cotyledons (c) three cotyledons
    (d) four cotyledons
  35. The following are example of dicot plants except
    (a) cowpea (b) groundnut (c) soybeans (d) Maize.
  36. Which of these crops is not an annual crop? (a) cotton (b) cowpea (c) cocoa (d) orange
  37. The leave of tomato plant possesses what type of venation (a) parallel (b) Net (c) vertical (d)
    cross.
  38. Crops that complete their life cycle in more than two years are called _
    (a) Perennials (b) Biennials (c) Annuals (d) Decennial
    THEORY
  39. a. Define dicotyledonous plant.
    b. State five examples.
  40. Outline five characteristics of dicot plants.
  41. Mention three examples of annual crop.
  42. DIFFERENCES BETWEEN MONOCOT AND DICOT PLANTS
  43. MONOCOTYLEDONOUS PLANTS DICOTYLEDONOUS PLANTS
  44. They have one seed leaf they have two seed leaves
    2.Their leaves have parallel veins they leaves have net venation
    3.They have fibrous root system they have tap root system
  45. The leaves have smooth margin their leaves are with rough or serrated margins
  46. They have hollow stems with no they have cambium tissue in their stem.
    Cambium tissue.
  47. They have long slender leaves. their leaves are short and broad.
    GENERAL EVALUATION AND REVISION QUESTIONS
  48. What are monocot plants?
  49. What are dicot plants?
  50. Give five examples of monocot plants.
  51. Give five examples of dicot plants.
  52. In tabular form, distinguish between monocot and dicot plants.
    READING ASSIGNMENT
    Junior Secondary Agriculture for Nigerian Schools by A. Yondeowei Bk. 1. Chapter 3, pages 23.
    WEEKEND ASSIGNMENT
  53. Dicotyledonous plants have _ (a) One cotyledons (b) two cotyledons (c) three cotyledons
    (d) four cotyledons
  54. The following are example of dicot plants except
    (a) cowpea (b) groundnut (c) soybeans (d) Maize.
  55. Which of these crops is not an annual crop? (a) cotton (b) cowpea (c) cocoa (d) orange
  56. The leave of tomato plant possesses what type of venation (a) parallel (b) Net (c) vertical (d)
    cross.
  57. Crops that complete their life cycle in more than two years are called _
    (a) Perennials (b) Biennials (c) Annuals (d) Decennial
    THEORY
  58. a. Define dicotyledonous plant.
    b. State five examples.
  59. Outline five characteristics of dicot plants.
  60. Mention three examples of annual crop.