Regeneration of damaged growing grass following grazing is largely due to

Root hairs develop from the region of

Which of the following is made up of dead cells?

Specialised epidermal cells surrounding the guard cells are called

Tracheids differ from other trachery elements in

Companion cells are closely associated with

Closed vascular bundles lack

Ground tissue includes

The chief water conducting elements of xylem in gymnosperms are

Which one of the following is not a lateral meristem?

Palisade parenchyma is absent in leaves of

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

In barley stem, vascular bundles are

Reduction in vascular tissue, mechanical tissue and cuticle is characteristic of

The length of different internodes in a culm of sugarcane is variable because of

Vascular tissues in flowering plants develop from

Passage cells are thin walled cells found in

A common structural feature of vessel elements and sieve tube elements are

Chlorenchyma is known to develop in the

The apical meristem of the root is present

The cells of the quiescent centre are characterised by

Vessels are found in

Four radial vascular bundles are found in

Axillary bud and terminal bud are derived from the activity of

Which of the following statements is true?

What happens during vascularisation in plants?

Which of the following meristems is responsible for extrastelar secondary growth in dicotyledonous stem?

A leaf primordium grows into the adult leaf lamina by means of

At maturity which of the following is enucleate?

What is not true about sclereids?

Bordered pits are found in

Which is correct about transport or conduction of substances?

Angular collenchyma occurs in

An organised and differentiated cellular structure having cytoplasm but no nucleus is

Collenchyma occurs in the stem and petioles of

Monocot leaves possess

Organisation of stem apex into corpus and tunica is determined mainly by

Sieve tubes are suited for translocation of food because they possess

Death of protoplasm is a prerequisite for a vital function like

Out of diffuse porous and ring porous woods, which is correct?

Which meristem helps in increasing girth?

Tunica corpus theory is connected with

In dicot root, the vascular cambium originates from

Casparian strips occur in

The balloon-shaped structures called tyloses

Cortex is the region found between

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

In a woody dicotyledonous tree which of the following parts will mainly consist of primary tissues?

Ectophloic siphonostele is found in

In a longitudinal section of root, starting from the tip upward, the four zones occur in the following order

Pericycle of roots produces

Where do the casparian bands occur?

A bicollateral vascular bundle is characterised by

Select the correct pair.

Which of the following statements about cork cambium is incorrect?

Which of the statements given below is not true about formation of annual rings in trees?

Plants having little or no secondary growth are

Secondary xylem and phloem in dicot stem are produced by

Plants having little or no secondary growth are

The vascular cambium normal gives rise to

You are given a fairly old piece of dicot stem and a dicot root. Which of the following anatomical structures will you use to distinguish between the two?

Interfascicular cambium develops from the cells of

Age of a tree can be estimated by

The cork cambium, cork and secondary cortex are collectively called

Heartwood differs from sapwood in

For a critical study of secondary growth in plants which one of the following pairs is suitable?

Main function of lenticel is

As the secondary growth takes place (proceeds) in a tree, thickness of

Procambium forms

Abnormal/anomalous secondary growth occurs in

A narrow layer of thin walled cells found between phloem/bark and wood of a dicot is

Periderm is produced by

Which exposed wood will decay faster?

Commercial cork is obtained from

Cork cambium and vascular cambium are

For union between stock and scion in grafting which one is the first to occur?

Vascular cambium produces

Cork is formed from

Water containing cavities in vascular bundles are found in

What is true about a monocot leaf?

Pith and cortex do not differentiate in