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Chapter 23: Problem 18

Where is the vascular cambium located in an established woody plant? a. between the primary xylem and the primary phloem b. between the secondary xylem and the primary phloem c. between the secondary xylem and the secondary phloem d. between the primary xylem and the secondary phloem

Short Answer

Expert verified
c. between the secondary xylem and the secondary phloem.

Step by step solution

01

Understand the Vascular Cambium

The vascular cambium is a type of meristematic tissue that is essential for the growth in diameter of woody plants. It produces secondary xylem (wood) inward and secondary phloem (inner bark) outward.
02

Identify Primary and Secondary Tissues

Primary tissues are formed during primary growth (lengthwise), whereas secondary tissues (like secondary xylem and phloem) are formed during secondary growth (increase in girth).
03

Location of Primary and Secondary Tissues

In an established woody plant, the primary xylem is located towards the center, the primary phloem towards the outer side, and between them, the plant adds layers of secondary xylem and secondary phloem.
04

Position of Vascular Cambium

The vascular cambium is between the secondary xylem and the secondary phloem since it produces these tissues during secondary growth.
05

Choose Correct Option

Based on the explained position of the vascular cambium, the correct option is: c. between the secondary xylem and the secondary phloem.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Secondary Growth
In woody plants, secondary growth leads to an increase in the diameter of stems and roots. Unlike primary growth, which extends the length of the plant, secondary growth adds girth. This growth occurs thanks to the vascular cambium, a type of lateral meristematic tissue that produces secondary xylem and secondary phloem.
The secondary xylem forms the wood, while the secondary phloem is part of the inner bark. This differentiation helps plants to support taller structures and transport water and nutrients more efficiently.
  • Creates additional structural support.
  • Improves nutrient and water transport.
Meristematic Tissue
Meristematic tissues are crucial for plant growth. They are regions of actively dividing cells. The cells in meristematic tissue have the capacity to become various types of tissues as the plant needs.
There are two main types of meristematic tissues:
  • Apical Meristems 鈥� responsible for primary growth (length of stems and roots).
  • Lateral Meristems 鈥� responsible for secondary growth (girth of stems and roots).
The vascular cambium is a lateral meristem located between the secondary xylem and secondary phloem in woody plants.
It produces cells that become these secondary tissues and aids in the plant鈥檚 increase in diameter.
Woody Plants
Woody plants are types of plants whose stems and trunks are covered with bark and have a strong wood inside. These plants, including trees and shrubs, rely heavily on secondary growth for their structure and survival.
Woody plants adapt better to various environments thanks to the durable structure provided by secondary xylem (wood) and secondary phloem (inner bark).
  • Trees, such as oak and maple, are prime examples of woody plants.
  • Woody plants can live for many years, adding new layers of wood and bark annually.
The vascular cambium, a lateral meristem positioned between the secondary xylem and secondary phloem, plays a critical role in forming these structural components.

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Most popular questions from this chapter

Modified organs are part of survival strategies of plants. Which of these plants has a flattened, photosynthetic stem that could be mistaken for a leaf? a. fern b. cactus c. potato d. iris

During a severe drought, the soil becomes dry and its water potential decreases. Many plants will wilt in such an environment. Consider that the overall water potential for a system is represented by the equation: \Psisystem \(=\Psi\) total \(=\Psi_{S}+\Psi_{P}+\Psi_{g}+\Psi_{m}\) What is one reason that plants are unable to draw water from the soil? a. The water potential of the soil becomes lower than the water potential of the plants. b. The water potential of the soil becomes lower than the solute potential of the plants. c. The water potential of the soil becomes higher than the water potential of the plants. d. The solute potential of the soil becomes lower than the water potential of the plants.

Plants regulate their internal water potential by opening and closing stomata. Which events take place when stomata open? a. Water vapor is lost to the external environment, increasing the rate of transpiration. b. Water vapor is lost to the external environment, decreasing the rate of transpiration. c. Water vapor enters the spaces in the mesophyll, increasing the rate of transpiration. d. The rate of photosynthesis drops when stomata open.

An herbicide is developed that impairs the function of the cork cambium in woody plants. Which changes in the plant should be monitored to gauge the effectiveness of the herbicide? a. Cork will not be produced and the plant will not increase in girth. b. Excess cork will be produced and annual rings will not be formed. c. Cork will not be produced and the plant will not be able to exchange gases. d. Excess cork will be produced and the plant will not increase in girth.

Students are sketching diagrams of the shoot system of angiosperms for a plant anatomy class. These lists describe diagrams made by four students. Which diagram represents the shoot system incorrectly? a. leaves, stem, fruit, flowers b. stem, fruit, leaves, branches c. flowers, leaves, branches, stem d. stem, hair roots, leaves, flowers, branches
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