Home
Class 12
BIOLOGY
A: Oldest layer of sapwood lies just out...

A: Oldest layer of sapwood lies just outside vascualr cambium.
R: Sapwood contains actively conducting vessels and occupies central part of stem.

A

If both Assertion & Reason are true and the reason is the correct expalanation of the assertion. Then mark (1).

B

If Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)

C

If Assertion is true statement but Reason is false, then mark (3).

D

If both Assertion and Reason are false statements, then mark (4)

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • ANATOMY OF FLOWERING PLANTS

    AAKASH INSTITUTE ENGLISH|Exercise Section C Previous Year Questions|61 Videos

  • ANIMAL KINGDOM (CHORDATES)

    AAKASH INSTITUTE ENGLISH|Exercise Assignment (Section-D)|10 Videos

Similar Questions

Explore conceptually related problems

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

Go through the following statements (i) The cambium is generally more acitve on the inner side than on the outer. (ii) The autunn wood is darker and has a higher density than spring wood. (iii) In stem, the secondary xylem shows distinction into protoxylem and metaxylem and occurs in the form of patches. (iv) The tracheids and vessels of the sapwood get plugged by the ingrowth of the adjacent parenchyma cells into thier cavities called tyloses. Which of theses are correct ?

Study carefully the following statements and select the incorrect one(s). (i). Lateralroots develop from pericycle. (ii) . Endodermis is the innermost layer of cortex (iii). Sapwood is the central, dark coloured, non-conducting part of secondary xylem.

[A]: Ringing/Girdling experiments involved removal of all tissues outside endodermis from a woody stem. [R]: The upper & lower part of the plant is at- tached by central xylem & phloem.

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