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- What is the primary function of bark in trees?
a) Water transport
b) Nutrient storage
c) Protection against pests and diseases
d) Photosynthesis
Answer: c) Protection against pests and diseases
- Which layer of the bark is responsible for transporting nutrients?
a) Cork
b) Phloem
c) Cambium
d) Xylem
Answer: b) Phloem
- What is the outermost layer of bark called?
a) Cork
b) Cortex
c) Phloem
d) Cambium
Answer: a) Cork
- Which type of wood is known for having large, visible vessels?
a) Hardwoods
b) Softwoods
c) Both a and b
d) Neither
Answer: a) Hardwoods
- What tissue forms the bulk of the wood in trees?
a) Phloem
b) Xylem
c) Cork
d) Cambium
Answer: b) Xylem
- What is the role of the cambium in trees?
a) Photosynthesis
b) Secondary growth
c) Nutrient transport
d) Water absorption
Answer: b) Secondary growth
- Which component of wood provides structural support?
a) Phloem
b) Parenchyma
c) Sclerenchyma
d) Xylem
Answer: d) Xylem
- What is the main difference between hardwoods and softwoods?
a) Density
b) Type of leaves
c) Presence of vessels
d) All of the above
Answer: d) All of the above
- What is the function of the cork cambium?
a) To produce new xylem
b) To produce new phloem
c) To produce cork cells
d) To transport water
Answer: c) To produce cork cells
- Which type of wood typically has a more uniform structure with no vessels?
a) Hardwoods
b) Softwoods
c) Both a and b
d) Neither
Answer: b) Softwoods
- What is the term for the annual rings in wood?
a) Growth rings
b) Vascular rings
c) Cambial rings
d) Bark rings
Answer: a) Growth rings
- What is the primary component of the cell wall in wood cells?
a) Cellulose
b) Lignin
c) Hemicellulose
d) Starch
Answer: b) Lignin
- Which layer of bark can be shed annually in some trees?
a) Cork
b) Phloem
c) Cambium
d) Cortex
Answer: a) Cork
- Which structure allows for the transport of water in xylem?
a) Tracheids
b) Sieve tubes
c) Companion cells
d) Phloem fibers
Answer: a) Tracheids
- What type of growth occurs in the cambium layer?
a) Primary growth
b) Secondary growth
c) Tertiary growth
d) Lateral growth
Answer: b) Secondary growth
- What is the primary role of parenchyma cells in wood?
a) Support
b) Storage
c) Transport
d) Photosynthesis
Answer: b) Storage
- What is the term for the non-vascular tissue found in bark?
a) Vascular cambium
b) Cork
c) Parenchyma
d) Both b and c
Answer: d) Both b and c
- In which type of wood are fibers more prevalent?
a) Hardwoods
b) Softwoods
c) Both a and b
d) Neither
Answer: a) Hardwoods
- What is a common characteristic of the bark of many tropical trees?
a) Thin and smooth
b) Thick and corky
c) Transparent
d) Very hard
Answer: b) Thick and corky
- Which of the following is NOT a part of the bark?
a) Phloem
b) Xylem
c) Cork
d) Cambium
Answer: b) Xylem
- What happens to the old phloem as new layers are produced?
a) It becomes functional
b) It is pushed outward
c) It dies and is replaced
d) It remains active
Answer: c) It dies and is replaced
- Which part of the wood is responsible for the transport of nutrients?
a) Heartwood
b) Sapwood
c) Cambium
d) Cork
Answer: b) Sapwood
- What is heartwood?
a) The outer layer of the tree
b) The inner, non-functional part of the xylem
c) The actively growing part of the tree
d) The layer producing new bark
Answer: b) The inner, non-functional part of the xylem
- How does bark thickness generally change with tree age?
a) It decreases
b) It remains constant
c) It increases
d) It varies randomly
Answer: c) It increases
- Which component of wood is primarily responsible for its strength?
a) Cellulose
b) Hemicellulose
c) Lignin
d) Pectin
Answer: c) Lignin
- What is the main role of the xylem in trees?
a) Transporting nutrients
b) Storing carbohydrates
c) Conducting water
d) Photosynthesis
Answer: c) Conducting water
- What does the presence of large pores in wood indicate?
a) Slow growth
b) Rapid growth
c) Age of the tree
d) High lignin content
Answer: b) Rapid growth
- In addition to water, what does xylem also transport?
a) Sugars
b) Minerals
c) Hormones
d) Gases
Answer: b) Minerals
- What is a function of the cork layer in bark?
a) Photosynthesis
b) Water storage
c) Protection against water loss
d) Nutrient transport
Answer: c) Protection against water loss
- Which part of the bark is often used in medicinal applications?
a) Cork
b) Phloem
c) Cambium
d) All of the above
Answer: a) Cork
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