Aestivation of petals in the flower of cotton is correctly shown in
C.
Petals in the flowers of cotton (Gossypium sp) china rose (Hibiscus rosa sinesis), etc, show twisted aestivation. In this type of aestivation, a regular overlapping of petals occurs where one margin of each petal overlaps with the next one petal.
In land plants, the guard cells differ from other epidermal cells in having
mitochondria
endoplasmic reticulum
chloroplasts
chloroplasts
The cork cambium, cork and secondary cortex are collectively called
Phellogen
Periderm
phellem
phellem
Function of copanion cells is
providing energy to sleve elements for active transport
Providing water to phloem
loading of sucrose into sieve elements by passive transport
loading of sucrose into sieve elements by passive transport
Some vascular bundles are described as open because these
are surrounded by pericycle but no endodermis
are capable of producing secondary xylem and phloem
Possess conjunctive tissue between xylem and phloem
Possess conjunctive tissue between xylem and phloem
Which one of the following is not a lateral meristem?
Intrafascicular cambium
interfascicular cambium
Phellogen
Phellogen
Heartwood differs from sapwood in
Presence of rays and fibres
the absence of vessels and parenchyma
having dead and non-conducting elements
having dead and non-conducting elements
Transport of food material in higher plants takes place through
companion cells
transfusion tissue
tracheids
tracheids
Black (stem) rust of wheat is caused by
Alternaria solani
Ustilago nuda
Puccinia graminis
Puccinia graminis
