Home
Class 12
BIOLOGY
The annular and spirally thickened condu...

The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem is

A

Widening

B

Differentiating

C

Maturing

D

Elogating

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • AIPMT-2014(HUMAN PHYIOLOGY )

    TRUEMAN BIOLOGY|Exercise MCQs|19 Videos

  • Animal Kingdom

    TRUEMAN BIOLOGY|Exercise ASSERTION AND REASON|51 Videos

Similar Questions

Explore conceptually related problems

Read the following statements (i) Collenchyma contains lignin in its wall thickenings. (ii) Collenchyma occurs in only aerial parimary parts and s absent from the roots. (iii) Trichomes are multicellular epidermal outgrowths, which also contain some inner tissues. (iv) Xylem fibres often occur in metaxylem while they are absent or rare in protoxylem. which of these are correct?

Assertion : A correct concentration of auxin and cytokinin is required for the development of root and shoot in callus. Reason: When the ratio of kinetin to auxin is high only shoot develop but when the ratio is low only roots develop

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 metxylem and occurs in the from 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 ?