Home
Class 11
BIOLOGY
The latest formed secondary xylem is loc...

The latest formed secondary xylem is located

A

Immediately external to vascular cambium

B

Immediately beneath the vascular cambium

C

Immediately internal to phellogen

D

Between secondary phloem and cork cambium

Text Solution

AI Generated Solution

The correct Answer is:
To determine the location of the latest formed secondary xylem, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the Structure of a Stem**: - In a typical dicot stem, the vascular tissue is arranged in a ring. The vascular cambium is located between the xylem and phloem. 2. **Identify the Components**: - The secondary xylem is produced by the vascular cambium. It consists of two types: sapwood (the outer layer) and hardwood (the inner layer). 3. **Determine the Youngest Secondary Xylem**: - The youngest or latest formed secondary xylem is produced by the vascular cambium. As new layers are formed, they are added towards the inside of the stem. 4. **Locate the Position**: - The latest formed secondary xylem is located immediately beneath the vascular cambium. This is because the vascular cambium divides to produce new xylem cells towards the inside and new phloem cells towards the outside. 5. **Evaluate the Options**: - The options provided are: 1. Immediately external to vascular cambium 2. Immediately beneath the vascular cambium 3. Immediately internal to phloem 4. Between secondary phloem and cork cambium - Based on our understanding, the correct answer is option 2: "immediately beneath the vascular cambium". ### Final Answer: The latest formed secondary xylem is located **immediately beneath the vascular cambium**. ---
Promotional Banner

Topper's Solved these Questions

  • HISTOLOGY AND ANATOMY OF FLOWERING PLANTS

    AAKASH SERIES|Exercise EXERCISE - III (PREVIOUS AIPMT/NEET QUESTIONS)|24 Videos

  • HISTOLOGY AND ANATOMY OF FLOWERING PLANTS

    AAKASH SERIES|Exercise EXERCISE - I (SECONDARY GROWTH)|45 Videos

  • ENVIRONMENTAL ISSUES

    AAKASH SERIES|Exercise Exercise-III (Previous AIPMT/NEET Questions)|41 Videos

  • HUMAN HEALTH DISEASE

    AAKASH SERIES|Exercise EXERCISE - III (PREVIOUS AIPMT/NEET QUESTIONS)|56 Videos

Similar Questions

Explore conceptually related problems

Assertion: The greater part of secondary xylem is lighter in colour and consists of dead elements with highly lignified walls and is called heartwood. Reason The peripheral region of the secondary xylem is dark brown in colour and is called sapwood.

In a five year-old stem the oldest layer of secondary xylem is situated just outside the primary xylem.

In a dicot stem, youngest layer of secondary xylem is situated

In a mature dicot stem which has undergone seconday growth, youngest layer of secondary xylem is situated

Assertion: Secondary growth usually occurs in dicotyledonous stems. Reason: The vascular cambium present between xylem and phloem possesses the ability to form secondary xylem and secondary phloem respectively.

Secondary nucleus is formed by

In an old stem, the oldest secondary xylem is found just (a) inner to vascular cambium (b) outside primary xylem (c) outside vascular cambium (d) inner to phellogen

Youngest layer of secondary xylem in wood of dicot stem is located just

Peripheral region of secondary xylem is

Name the lateral meristem which is responsible for the formation of secondary xylem, secondary phloem and secondary medullary rays?