Which of the following statements about cork cambium is incorrect?

1.	It forms a secondary cortex on its outside
2.	It forms a part of periderm
3.	It is responsible for the formation of lenticels
4.	It is a couple of layers thick

Given below is the diagram of a stomatal apparatus. In which of the following, all the four parts labelled as A, B, C and D are correctly identified:

Some vascular bundles are described as open because these:

Large, empty colourless cells of the adaxial epidermis along the veins of grass leaves are:

The periderm includes:
1.  Secondary phloem
2.  Cork
3.  Cambium
4.  All of these

The main function of lenticel is:

Vessels are found in:

Four radial V.B. are found in:

Match List-I with List-II.

Choose the correct answer from the options given below:

The transverse section of a plant shows following anatomical features:

Identify the category of plant and its part : 

1. Monocotyledonous root 

2. Dicotyledonous stem 

3. Dicotyledonous root 

4. Monocotyledonous stem