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

1. Lenticels

2. Guard cells

3. Bundle sheath cells

4. Bulliform cells

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 :
1. are not surrounded by pericycle
2. are surrounded by pericycle but no
endodermis
3. are capable of producing secondary xylem
and phloem
4. possess conjunctive tissue between xylem
and phloem

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

Main function of lenticel is : -
1. Transpiration
2. Guttation
3. Gaseous exchange
4. Bleeding

Vessels are found in : -

(1) All angiosperms and some gymnosperm

(2) Most of the angiosperm and few gymnosperms

(3) All angiosperms, all gymnosperms and some pteridophyta

(4) All pteridophyta

Four radial V.B. are found in : -
1.  Dicot root
2.  Monocot root
3.  Dicot stem
4.  Monocot stem

Axillary bud and terminal bud derived from the activity of : -
1. Lateral meristem
2. Intercalary meristem
3. Apical meristem
4. Parenchyma

The apical meristem of the root is present
1. Only in radicals
2. Only in tap roots
3. Only in adventitious roots
4. In all the roots