Download App

Anatomy of Flowering Plants — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYAnatomy of Flowering Plants3 Marks
Question
Give atleast three points of differences between Heartwood and Sapwood.
✓

Answer

 
Heart Wood
Sap Wood
1
It is the central core of wood formed after a certain years of secondary growth.
It is the peripheral part of the wood, formed after certain years of secondary growth.
2
It is composed of dead cells and darker in colour.
It is composed of living cells and lighter in colour.
3
It has no function in conduction.
It helps in conduction.
4
As it contains extractives (gums, resins, tannins, etc), it is more durable and resistant to attack by microbes and insects.
As it does not have these extractives, it is less durable and resistant to attack by insects and microbes.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "3 Marks Question" from Anatomy of Flowering Plants→Anatomy of Flowering Plants — all question types→BIOLOGY STD 11 Science question papers→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

Describe the type of photosynthetic pigments in red algae, green algae and brown algae.
→
Who was the first to attempt a more scientific basis for classification of living organisms? How did he classify plants and animals?
→
Describe the influence of temperature on enzyme action.
→
Explain the structure of thoracic chamber.
→
Differentiate between Blatta orientalis (oriental cockroach) and Periplanata americana (American cockroach).
→
What will be the pO2 and pCO2 in the atmospheric air compared to those in the alveolar air?
  1. pO2 lesser and pCO2 higher.
  2. pO2 higher and pCO2 lesser.
  3. pO2 higher and pCO2 higher.
  4. pO2 lesser and pCO2 lesser.
→
An Rh-negative woman is carrying an Rh-positive foetus for the second time. Describe the consequences of Rh-incompatibility in this case?

OR

Why is it necessary to check the Rh-factor of the blood of a pregnant woman?

→
Enlist the demerits of an artificial system of classification of plants.
→
Make a list of some proteins and their functions.
→
How is cardiac activity regulated by the nervous system?
→