Tracheids

Q.

Tracheids differ from other tracheary elements in:

1. lacking nucleus.

2. being imperforate.

3. being lignified.

4. having Casparian strips.

Q.

How do tracheids differ from other tracheary elements?

Q.

Which of the following is nucleated?

1. eve cell

2. Vessel

3. Companion cell

4. Vessel

Q. Water conducting elements of gymnosperms and primitive angiosperms are

1. Vessels
2. Vessel elements
3. Tracheids
4. Fibrotracheids

Q.

The chief water conducting elements of xylem in gymnosperms are

1. vessels

2. fibres

3. transfusion tissue

4. tracheids

Q. Assertion :In collateral vascular bundles, phloem is situated towards inner side. Reason: In monocot stem, cambium is present.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
3. Assertion is correct but Reason is incorrect.
4. Both Assertion and Reason are incorrect.