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Question & Answer Forum

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Syeda answered 1 year(s) , 7 month(s) ago

What are endarch and exarch conditions?

Answer.


They primary xylem tissue in plants is categorized into protoxylem and metaxylem. Protoxylem is the first part of the xylem to mature first and possess small cells. The developme...

Asked by Sagar

Nov 24

  • 2 Answers
  • 2 Likes
  • 46429 Views
Aruna kavitha answered 4 year(s) , 2 month(s) ago

What do you mean by obliterated central lumen ?

Sol:

Xylem is the vascular tissue extending from top to bottom of the plant. It helps in the transport of water molecules and dissolved substances from the root hairs to aerial parts of the plant. The trans

...

Asked by Sagar

Dec 5

  • 1 Answer
  • 1 Like
  • 10965 Views
Aruna kavitha answered 4 year(s) , 2 month(s) ago

What is the difference between septate and aseptate xylem fibres?

Sol:

Xylem is a vascular tissue responsible for conduction of water. It is a complex permanent tissue. Xylem comprises of cells of four types namely, vessels, tracheids, xylem parenchyma and xylem fibres.</

...

Asked by Sagar

Dec 5

  • 1 Answer
  • 0 Like
  • 9115 Views
Aruna kavitha answered 4 year(s) , 1 month(s) ago

What is an annual ring?

Sol:

Annual ring is the alternation of spring wood and autumn wood in a concentric circle on the trunk

When the plant is young, stem is also young. The vascular cambium at this stage is pres

...

Asked by Sagar

Dec 28

  • 1 Answer
  • 0 Like
  • 5823 Views
Aruna kavitha answered 3 year(s) ago

What is cork cambium? Explain its role in plants.

Sol:

Secondary growth is the increase in the girth of the stems and roots of plants. Secondary growth is brought about by lateral meristems, vascular and cork cambiums.

*During s...

Asked by Sagar

Jan 30

  • 1 Answer
  • 0 Like
  • 5331 Views
Aruna kavitha answered 4 year(s) ago

How does secondary growth occur in dicot plants? Why don't monocot plants exhibit secondary growth?

Sol:

Secondary growth is seen in dicots. Most monocots and herbaceous plants undergo little or no secondary growth.

Cambium is a thin layer of actively dividing cells which are responsible f

...

Asked by Sanalkumar

Jan 9

  • 1 Answer
  • 1 Like
  • 5318 Views
Aruna kavitha answered 3 year(s) , 7 month(s) ago

What are complex permanent tissues? Explain in detail.

Sol:

Permanent tissues are the tissues which have lost the capacity to divide. They can be thin walled or thick walled and have permanent shape. Permanent tissues can be simple or permanent comp...

  • 1 Answer
  • 1 Like
  • 4953 Views
Aruna kavitha answered 4 year(s) , 2 month(s) ago

What are sclerenchyma? Explain the cell structure in sclerenchyma.

Sol:
Ground tissue in plants comprises parenchyma, collenchyma and sclerenchyma.

Sclerenchyma – These are long, dead cells with a deposit of lignin in their cell wall.  They have no intercellular

...

Asked by Sagar

Dec 5

  • 1 Answer
  • 0 Like
  • 4753 Views
Sanalkumar commented 4 year(s) , 2 month(s) ago

Explain the process of secondary growth in monocot and dicot roots.

Sol:

Secondary growth is seen in dicots. Most monocots and herbaceous plants undergo little or no secondary growth.
Secondary growth:
Secondary growth is the in...

Asked by Sanalkumar

Nov 15

  • 1 Answer
  • 0 Like
  • 3274 Views
Aruna kavitha answered 3 year(s) , 10 month(s) ago

What are bulliform cells?

Sol:
Bulliform cells are the cell distributed between the epidermal cells of the leaf. They are responsible for storage of water. Bulliform cells help in rolling of leaves to prevent loss of water throu...

Asked by Uttam

Mar 22

  • 1 Answer
  • 0 Like
  • 2250 Views
Aruna kavitha answered 4 year(s) ago

What is secondary growth? Explain the process of secondary growth in stems.

Sol:

Secondary growth is seen in dicots. Most monocots and herbaceous plants undergo little or no secondary growth.


Secondary growth is the increase in the girth of the stems and root

...

Asked by Sagar

Dec 28

  • 1 Answer
  • 0 Like
  • 2160 Views
Aruna kavitha answered 4 year(s) , 1 month(s) ago

Differentiate between a monocot stem and a dicot stem.

Sol:

A transverse sections of a dicot stem and a monocot stem show epidermis, cortex and stele. A monocot stem also has the same structures as that of dicot stem with some differences.

D

...

Asked by Sagar

Dec 28

  • 1 Answer
  • 0 Like
  • 2136 Views
Aruna kavitha answered 4 year(s) , 2 month(s) ago

What are collenchyma? Explain the cell structure in collenchyma.

Sol:

Collenchyma – These are elongated living cells with small intercellular spaces. Their cell walls are thick at cornsers due to cellulose, hemicellulose and pectin deposits. They may be oval, spherical o

...

Asked by Sagar

Dec 5

  • 1 Answer
  • 0 Like
  • 1802 Views
Sanalkumar answered 4 year(s) ago

What is closed vascular bundles?

SOME VASCULAR BUNDLES THAT ARE ARRANGED CONJOINTLY DO NOT HAVE CAMBIUM BETWEEN XYLEM AND PHLOEM .THIS IS TERMED AS CLOSED  VASCULAR BUNDLES.IT IS MAINLY FOUND IN MONOCOT PLANTS.

Asked by Kasi

Apr 3

  • 2 Answers
  • 0 Like
  • 1687 Views
Aruna kavitha answered 4 year(s) , 2 month(s) ago

Name the organ in which endodermis is absent.

Sol:
Endodermis is absent in leaves. Cells of endodermis possess casparian strips or bands in their radial and transverse walls
Internal structure of both dicot and monocot leaves exhibit only e...

Asked by Riya

Nov 15

  • 1 Answer
  • 0 Like
  • 1555 Views
Surya rao answered 4 year(s) , 10 month(s) ago

Stomatal apparatus?

The stomatal aperture, guard cells and the surrounding subsidiary cells are together called stomatal apparatus.

Asked by Kasi

Apr 3

  • 2 Answers
  • 0 Like
  • 1386 Views
Surya rao answered 4 year(s) , 10 month(s) ago

Monocot and dicot root difference

  Monocots Dicots Adventitious root system
  Tap root system Parallel venation in leaves
  Reticulate venation in leaves
  Flower parts in multi...

Asked by Kasi

Apr 3

  • 2 Answers
  • 0 Like
  • 1150 Views
Sanalkumar commented 3 year(s) ago

Two types of sieve elements found in phloem?

THE SIEVE ELEMENTS FOUND IN PHLOEM

Asked by Kasi

Apr 3

  • 2 Answers
  • 0 Like
  • 1044 Views
Surya rao answered 4 year(s) , 10 month(s) ago

What are vascular bundles?

Vascular bundles are segments of xylem and associated phloem that run longitudinally through the stems and roots of higher plants.

Asked by Kasi

Apr 3

  • 3 Answers
  • 0 Like
  • 967 Views
Surya rao answered 4 year(s) , 10 month(s) ago

Where can we find bulliform cells?

In isobilateral monocot leaf.

Asked by Kasi

Apr 3

  • 2 Answers
  • 0 Like
  • 910 Views
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