Tree Growth and Bark Functions

The video tutorial explores the concept of secondary growth in trees, focusing on the roles of vascular cambium and core cambium. It explains how these processes contribute to the increase in girth and protection of trees. The formation of cork and its functions, including water loss prevention and infection protection, are discussed. The video also covers the structure and role of periderm and lenticels in gas exchange. The composition of bark, including outer and inner bark, is explained. Finally, the significance of secondary growth in providing support, protection, and commercial products like cork and wood is highlighted.

What is the primary function of the vascular cambium in trees?

• To increase the height of the tree

• To form flowers and fruits

• To increase the thickness of the tree

• To produce leaves

What is another name for the core cambium?

• Phloem

• Phelogen

• Periderm

• Xylem

Which of the following is NOT a function of cork cells?

• Preventing water loss

• Facilitating photosynthesis

• Protecting against infection

• Providing mechanical support

Which tissue is responsible for forming the secondary cortex?

• Xylem

• Phloem

• Epidermis

• Phelogen

What are lenticels primarily responsible for?

• Nutrient transport

• Gas exchange

• Water absorption

• Photosynthesis

What is the role of periderm in trees?

• To store nutrients

• To replace the epidermis and provide protection

• To transport water

• To produce seeds

What is the outer bark primarily composed of?

• Living cells

• Dead cells

• Xylem

• Phloem

Which part of the bark is made of living tissues?

• Outer bark

• Cork

• Periderm

• Inner bark

What is the main significance of secondary growth in trees?

• To produce flowers

• To increase leaf size

• To provide support and protection

• To enhance photosynthesis

Which of the following is a commercially important product obtained from secondary growth?

• Leaves

• Fruits

• Cork

• Roots