CBSE Class 11   CBSE Class 11 Biology


Cut a transverse section of young stem of a plant from your school garden (2)
How does cambium ring form in a dicot stem? (2)
(i) How the continued secondary growth affects stem? (2)
Demonstrate and explain the formation of annual ring in the transverse (2)
Lentides are loosely arranged areas in the periderm (2)
Composition of bade and its functions (2)
Explain the process of formation of vascular cambium (2)
Cork cambium forms tissues that form the cork (2)
Palm is a monocotyledonous plant, yet it increases in girth (2)
What is the nature ofxylem elements in spring and autumn wood? (2)
Men tion the functions of cortex region of monocot root (2)
(i) Name the tissue that lies between epidermis and pericycle (2)
(i) What is the origin of secondary phloem? (2)
Mention the features of isobilateral leaves (2)
List out the significance of secondary growth (2)
Write one difference between mesophyll of dicot leaf and a monocot leaf (2)
While estimating the age of a tree, what will you observe (2)
(i) Which cells compose pericyde? (2)
List out the function of ground tissue system (2)
Describe the cortex region of dicot root (2)
How does the periderm formation take place in the dicot stems? (2)
Tunics of some of the aged tree species appear to be composed (2)
Distinguish between following (2)
(i) How will you classify vascular bundles in different types? (3)
What is stomatal apparatus? Explain the structure (2)
Name the three basic tissues systems in the flowering plants (2)
Location and function of different types ofmeristems (2)
Rani was amazed to read about the layers and coverings in the plant (2)
Anurag and Amit (students of class Xlth) were best friends, (2)
List out th$ important characteristics of meristematic tissue (2)