Anatomy of Flowering Plants

In land plants, the guard cells differ from other epidermal cells in having

1. cytoskeleton
2. mitochondria
3. endoplasmic reticulum
4. chloroplasts

Transport of food material in higher plants takes place through -

1. Sieve elements
2. Transfusion tissue
3. Companion cells
4. Tracheids

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? [Figure]

1. A Epidermal cell, B Subsidiary cell, C Stomatal aperture, D Guard cell
2. A Subsidiary cell, B Epidermal cell, C Guard cell, D Stomatal aperture
3. A Guard cell, B Stomatal aperture, C Subsidiary cell, D Epidermal cell
4. A Epidermal cell, B Guard cell, C Stomatal aperture, D Subsidiary cell

Heartwood differs from sapwood in –

1. Having dead and non-conducting elements
2. Being susceptible to pests and pathogens
3. Presence of rays and fibres
4. Absence of vessels and parenchyma

Which one of the following is not a lateral meristem ?

1. Interfascicular cambium
2. Intercalary meristem
3. Intrafascicular cambium
4. Phellogen

The chief water conducting elements of xylem in gymnosperms are :

1. Fibres
2. Transfusion tissue
3. Vessels
4. Tracheids

In barley stem vascular bundles are -

1. Closed and scattered
2. Closed and radial
3. Open and in a ring
4. Open and scattered

Palisade parenchyma is absent in leaves of -

1. Mustard
2. Sorghum
3. Soybean
4. Gram

The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem is -

1. Maturing
2. Widening
3. Elongating
4. Differentiating

Anatomically fairly old dicotyledonous root is distinguished from the dicotyledonous stem by :

1. Absence of secondary phloem
2. Presence of cortex
3. Position of protoxylem
4. Absence of secondary xylem