The 'open' vascular bundles found in dicot stems are characterized by:
Scattered arrangement of xylem and phloem with no cambium.
The presence of cambium between xylem and phloem, allowing for secondary growth.
Joint, collateral arrangement of xylem and phloem with no cambium.
Concentric arrangement of xylem and phloem.
Related Questions
Which of the following statements are correct regarding plant modifications?
(a) Spines in Citrus and Bougainvillea are modified leaflets.
(b) Tendrils in cucumber and pumpkin are modified axillary buds.
(c) The stem in Opuntia is flattened, fleshy, and performs the function of leaves.
(d) Pneumatophores in Rhizophora grow vertically upwards for respiration.
(e) Stolons in grasses and strawberry aid in vegetative propagation.
(a, b, c)
(b, c, d, e)
(a, c, d)
(c, d, e)
Potato and sweet potato
Have edible parts, which are homologous organs
Have edible parts, which are analogous organs
Have been introduced in India from the same place
Are two species of the same genus
In a dicot stem undergoing secondary growth, which tissue is primarily responsible for the increase in girth?
Cork Cambium
Vascular Cambium
Apical Meristem
Intercalary Meristem
Which of the following is NOT a function of lenticels in woody stems?
Gaseous exchange
Transport of water and minerals
Transpiration
Providing a pathway for pathogens
Parts of the plants were observed. Structure-A develops aerially and produces roots when comes in contact with the soil. Structure-B develops from underground part of the stem, grow obliquely, becomes aerial and produces roots on its lower surface. Identify, respectively the structure of A and B
Sucker, stolon
Stolon, runner
Stolon, sucker
Runner, stolon
I. Bear leaves and branches II. Conduction of water and minerals III. Storage of food These are the functions of
Root
Stem
Leaves
Root cap
Stems are
Positively phototropic
Negatively geotropic
Negatively hydrotropic
All of the above
All of the following are properties of a square EXCEPT:
All sides are equal.
All angles are equal to .
Diagonals are equal and bisect each other at right angles.
Diagonals bisect the angles unequally.
Which of the following statements is incorrect regarding the properties of a parallelogram?
Opposite sides are equal and parallel.
Opposite angles are equal.
Adjacent angles are supplementary.
The diagonals are equal in length.
Which of the following two are the resultant of stipule modifications? I.Spines in Ziziphus. II.Tendrils in Smilax. III.Tendrils in Nepenthes. IV.Spines in Argemone. V.Thorns in Bougainvellea.
I and III
I and II
II and V
III and V
