Q. 34.0( 10 Votes )

Collect some aquatic plants- cut the leaves and stems Observe them under microscope and record your observations like air presence /absence of air spaces etc. and answer the below. (AS 3)

a) Why do they float on water?

b) What make them float?

c) Are there any other reasons for their floating?

d) Draw a diagram of what you have observed under microscope?

Answer :

a) They float in water due to the presence of air filled spaces in them.


b) Leaf bases of water plants form air filled structures to keep them afloat.


c) Partially submerged plants have numerous air spaces inside the stems leaves, roots that aid in gaseous exchange and buoyancy. This amplifies the buoyant force of the water making them float.


d) NOTE: To draw the diagram you must observe a cross-section of the plant stem under light microscope after staining it with safranin dye. Draw and label all the structures that can be observed.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Champ Quiz | The Five Kingdoms45 mins
Matter and Its Classification34 mins
Units to measure Temperature46 mins
Recently facts of 5th state of Matter: Bose Einstein Condensate52 mins
Be a Crackerjack of Pradeep's H.O.T.S. on Matter49 mins
Master Pradeep's Analytical Skill Questions36 mins
Quiz | Variation in 'g' in One Shot34 mins
Interconversion of Matter - Sublimation32 mins
What is in our blood?42 mins
Personality in Focus54 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses