Which of the following statements regarding plant tissues are TRUE?\n(A) Lenticels are porous tissues facilitating gaseous exchange.\n(B) Early season bark is termed soft bark.\n(C) 'Bark' encompasses all tissues external to the vascular cambium.\n(D) Phellogen is typically multi-layered.

## CORE INFORMATION\n✓ **Answer**: C. (A) and (C)\n## CONCEPT FRAMEWORK\n\t**Primary Concept**: Plant Tissue Structure and Function\n\t**Related Topics**: Dermal Tissue, Ground Tissue, Vascular Tissue, Secondary Growth\n\t**Prerequisites**: Basic understanding of plant anatomy and growth.\n## SOLUTION PATHWAY\n**Given Information**:\n\tStatements about plant tissues.\n**Method & Steps**:\n\t1. Analyze each statement individually based on botanical principles.\n\t2. Identify the true statements.\n\t3. Select the option containing the combination of true statements.\n## OPTION ANALYSIS\n[A] ✓: (A) and (C)\n\t(A) Lenticels are porous tissues facilitating gaseous exchange. - **TRUE**. Lenticels are lens-shaped pores in the periderm (part of the bark) that allow for gas exchange between the internal tissues and the atmosphere.\n\t(C) 'Bark' encompasses all tissues external to the vascular cambium. - **TRUE**. The bark includes the phloem, phelloderm (if present), phellogen (cork cambium), and phellem (cork).\n[B] :x: (B) and (C)\n\t(B) Early season bark is termed soft bark. - **FALSE**. There is no standard botanical term 'soft bark' related to early season growth. Bark characteristics change throughout the year, but not classified as 'soft bark'.\n[C] :x: Already covered as the correct answer.\n[D] :x: (C) and (D)\n\t(D) Phellogen is typically multi-layered. - **FALSE**. The phellogen, or cork cambium, is typically a single layer of cells that divide to produce the periderm.\n## LEARNING AIDS\n\t**Common Mistakes**:\n\t\t1. Confusing periderm with bark: Periderm is a part of the bark, but the bark includes other tissues as well.\n\t\t2. Misinterpreting the function of lenticels: They are not involved in water transport but in gas exchange.\n\t**Quick Tips**:\n\t\t1. Remember that 'bark' is everything outside the vascular cambium.\n\t\t2. Visualize the cross-section of a woody stem to understand the relative positions of different tissues.

The correct Option is "(A) and (C)"

The term 'bark' includes:\nI. Periderm\nII. Secondary phloem\nIII. Vascular cambium\nWhich of the above are correct?

## CORE INFORMATION\n✓ **Answer**: A\n## CONCEPT FRAMEWORK\n\t**Primary Concept**: Plant Anatomy - Bark Composition\n\t**Related Topics**: Secondary Growth, Periderm, Phloem, Vascular Cambium\n\t**Prerequisites**: Understanding of plant tissue systems and secondary growth.\n## SOLUTION PATHWAY\n**Given Information**:\n\tThe question asks about the components included in the term 'bark'.\n**Method & Steps**:\n\t1. **Define Bark**: Bark is the outermost layer of stems and roots of woody plants. It is everything outside the vascular cambium.\n\t2. **Components of Bark**: Bark is composed of all the tissues external to the vascular cambium, including the periderm and the secondary phloem.\n\t3. **Periderm**: The periderm is the protective outer layer that replaces the epidermis during secondary growth. It consists of the cork cambium (phellogen), cork (phellem), and phelloderm.\n\t4. **Secondary Phloem**: The secondary phloem is produced by the vascular cambium during secondary growth and transports sugars.\n\t5. **Vascular Cambium**: The vascular cambium is a meristematic layer that produces secondary xylem (wood) inwards and secondary phloem outwards. It is *not* part of the bark itself, but rather the boundary between the bark and the wood.\n\tResult: Bark includes the periderm and secondary phloem.\n## OPTION ANALYSIS\n[A] ✓: I and II (Periderm and Secondary Phloem): This is the correct answer as bark includes both the periderm and the secondary phloem.\n[B] :x: II and III (Secondary Phloem and Vascular Cambium): Incorrect. While the secondary phloem is part of the bark, the vascular cambium is not. It lies inside the bark.\n[C] :x: I and III (Periderm and Vascular Cambium): Incorrect. The periderm is part of the bark, but the vascular cambium is not.\n[D] :x: I, II, and III (Periderm, Secondary Phloem, and Vascular Cambium): Incorrect. The vascular cambium is not part of the bark.\n## LEARNING AIDS\n\t**Common Mistakes**:\n\t\t1. Including the vascular cambium as part of the bark: Remember that the vascular cambium is the dividing line between the wood and the bark, but it is *not* part of the bark itself.\n\t\t2. Confusing periderm with bark: The periderm is a *part* of the bark, but the bark also includes the secondary phloem.\n\t**Quick Tips**:\n\t\t1. Think of bark as everything outside the vascular cambium.\n\t\t2. Remember the acronym 'PSP' - Periderm, Secondary Phloem = Part of bark.

The correct Option is "I and II"

Which tissue is NOT considered part of the bark?\n(A) Cork\n(B) Vascular cambium\n(C) Phelloderm\n(D) Secondary phloem

## CORE INFORMATION\n✓ **Answer**: B\n## CONCEPT FRAMEWORK\n\t**Primary Concept**: Plant Anatomy - Bark Composition\n\t**Related Topics**: Plant Tissues, Secondary Growth, Periderm\n\t**Prerequisites**: Understanding of plant tissue types and secondary growth in plants.\n## SOLUTION PATHWAY\n**Given Information**:\n\tThe question asks which tissue is *not* part of the bark.\n**Method & Steps**:\n\t1. **Define bark**: Bark is the outermost layer of stems and roots of woody plants. It consists of all tissues external to the vascular cambium.\n\t2. **Identify bark components**: The bark typically includes the periderm (cork, cork cambium, and phelloderm) and the secondary phloem.\n\t3. **Identify the exception**: The vascular cambium is the meristematic layer *between* the xylem and phloem, responsible for producing secondary xylem (wood) and secondary phloem. It is *not* considered part of the bark itself.\n\tResult: The vascular cambium is not part of the bark.\n## OPTION ANALYSIS\n[A] :x: Cork is part of the periderm, which is a component of the bark.\n[B] ✓: The vascular cambium is the layer *between* the xylem and phloem and is responsible for secondary growth. It lies *inside* the bark.\n[C] :x: Phelloderm is part of the periderm, which is a component of the bark.\n[D] :x: Secondary phloem is a component of the bark.\n## LEARNING AIDS\n\t**Common Mistakes**:\n\t\t1. Confusing the vascular cambium with the bark: Remember the vascular cambium is the *origin* of secondary phloem and xylem, but it's not part of the bark itself.\n\t**Quick Tips**:\n\t\t1. Visualize a tree trunk: The bark is everything outside the wood. The vascular cambium is the thin layer *between* the wood and the bark.

Phellogen is responsible for producing:\n(A) Secondary xylem\n(B) Secondary phloem\n(C) Cork\n(D) Pith

## CORE INFORMATION\n✓ **Answer**: C. C\n## CONCEPT FRAMEWORK\n **Primary Concept**: Plant Anatomy: Meristematic Tissues\n **Related Topics**: Phellogen, Cork cambium, Periderm formation\n **Prerequisites**: Knowledge of the role of meristems in plant growth.\n## SOLUTION PATHWAY\n**Given Information**:\nFunction of phellogen (Secondary xylem, Secondary phloem, Cork, Pith)\n**Method & Steps**:\n1. Define Phellogen: Phellogen, also known as the cork cambium, is a lateral meristem that produces the periderm.\n2. Analyze products:\n (A) Secondary xylem: Produced by the vascular cambium.\n (B) Secondary phloem: Produced by the vascular cambium.\n (C) Cork: Produced by the phellogen (outer layer of periderm).\n (D) Pith: Found in the center of the stem; not produced by phellogen.\n3. Identify primary product:\n Phellogen primarily produces cork.\n## OPTION ANALYSIS\nA :x: Secondary xylem is produced by the vascular cambium.\nB :x: Secondary phloem is produced by the vascular cambium.\nC ✓: Cork is the primary product of phellogen.\nD :x: Pith is not produced by phellogen.\n## LEARNING AIDS\n **Common Mistakes**: Confusing phellogen with vascular cambium.\n **Quick Tips**: Remember that phellogen produces cork, a key component of the periderm.

NEET Botany Anatomy of Flowering Plants MCQs

Prepare for NEET Biology Anatomy of Flowering Plants with MCQs & PYQs on NEET.GUIDE. Enjoy free practice, previous year questions, and expert insights on plant tissues and structures.

NEET Questions / Botany / Anatomy of Flowering Plants