Heartwood and Sapwood

Q.

What is the main difference between heartwood and sapwood?

Q.

Sapwood can be differentiated from heartwood in being

1. Softer and non-conducting

2. Darker and non-conducting

3. Harder, darker and less conducting

4. Lighter and conducting

Q.

Heartwood helps in

1. Mechanical support

2. Translocation of food

3. Ascent of sap

4. Ascent of sap and mechanical support

Q. Identify the wrong statement in context of heartwood:

1. Organic compounds are deposited in it
2. It is highly durable
3. It conducts water and minerals efficiently
4. It comprises dead elements with highly lignified walls

Q.

Heart wood differs from sap wood in

1. presence of rays and fibres

2. absence of vessels and parenchyma

3. having dead and non-conducting elements

4. being susceptible to pests and pathogens

Q. Identify the correct statement in context of sapwood:

1. Durable in damp locations.
2. Comprises dead elements with highly lignified walls.
3. It contains valuable extractable materials like tannin and dyes.
4. It is highly efficient in conducting water and minerals.

Q. The feature which is common to both heartwood and sapwood is

1. both are the regions of secondary xylem
2. both are involved in the conduction of water
3. both are located in the central layers of the stem
4. both comprise dead elements with accumulation of aromatic compounds

Q. Tyloses can be found in

1. endodermis
2. cortical cells
3. secondary xylem
4. secondary phloem

Q. Tyloses can be found in

1. cortical cells
2. endodermis
3. secondary xylem
4. secondary phloem