16/06/2025
*GENERAL WOODWORK - NABTEB 2025 OBJECTIVE AND ESSAYS ANSWERS*
01-10: CDBCABAADD
11-20: CCACAACCCD
21-30: DADCBAAACB
31-40: BACBBDABDA
(WITH NUMBERING)
1.C 2.D 3.B 4.C 5.A 6.B 7.A 8.A 9.D 10.D
11.C 12.C 13.A 14.C 15.A 16.A 17.C 18.C 19.C 20.D
21.D 22.A 23.D 24.C 25.B 26.A 27.A 28.A 29.C 30.B
31.B 32.A 33.C 34.B 35.B 36.D 37.A 38.B 39.D 40.A
(1i)
Bark or Cortex:
(i) Protection: Serves as a protective barrier against physical injuries, pests, and disease.
(ii) Insulation: Helps regulate temperature within the tree by reducing water loss and retaining warmth.
(iii) Transport of nutrients: Facilitates the movement of food (sugars) made by the leaves down to the rest of the tree.
(1ii)
The Roots:
(i) Anchorage: Provide stability and keep the tree firmly anchored in the soil.
(ii) Absorption: Take up water and essential nutrients like nitrogen, phosphorus, and potassium from the soil.
(iii) Storage: Store excess food (starch) for future use by the tree during periods of stress or low nutrients.
(1iii)
Cambium Layer:
(i) Formation of new cells: Produces new phloem cells toward the outside and new xylem cells toward the inside.
(ii) Increase in thickness: Allows the tree to grow in girth or diameter as it adds additional rings each year.
(iii) Damage repair: Helps heal injured areas by generating new cells to replace damaged ones.
(1iv)
The Sapwood:
(i) Conduction of water: Transports water and nutrients upward from roots to leaves.
(ii) Support: Contributes to the structural stability of the tree while retaining its flexibility.
(iii) Storage of nutrients: Stores starch and other food reserves for future growth and energy.
(1v)
Medullary Ray:
(i) Transport of nutrients: Facilitates horizontal movement of food, water, and other nutrients across the trunk.
(ii) Storage: Stores food and other resources within its cells.
(iii) Structural strengthening: Helps provide additional stability by tying together different rings of wood.
(2ai)
(Draw the diagram)
(2aii)
(Draw
