Interfascicular cambium develops from the cells of
medullary rays
xylem parenchyma
endodermis
pericycle
A.
medullary rays
In dicot stems, the cells of cambium present between primary xylem and primary phloem is the intrafasicular cambium. The cells of medullary rays, adjoining these intrafascicular cambium become meristematic and form the interfascicular cambium.
In dicot roots the innermost layer of the cortex is called endodermis. Next to endodermis lies a few layers of thick-walled parenchymatous cells called as pericycle.
Select the wrong statement.
Isogametes are similar in structure, function and behaviour
Anisogametes differ either in structure, function and behaviour
In oomycetes female gamete is smaller and motile, while male gamete is larger and non-motile
Chlamydomonas exhibits both isogamy and anisogamy and Fucus shows oogamy
Read the following statements (IV) and answer the question which follows them
I. In liverworts, mosses and ferns gametophytes are free living.
II. Gymnosperms and some ferns are heterospores.
III. Sexual reproduction in Fucus, Volvox and Albugo is oogamous.
IV. The sporophyte in liverworts is more elaborate than that in mosses.
How many of the above statements are correct?
One
Two
Three
Four
In China rose the flowers are
actinomorphic, hypogynous with twisted aestivation
actinomorphic, epigynous with valvate aestivation
zygomorphic, hypogynous with imbricate aestivation
zygomorphic, epigynous with twisted aestivation
Among bitter gourd, mustard, brinjal, pumpkin, China rose, lupin, cucumber, sunnhemp, gram, guava, bean, chilli, plum, Petunia, tomato, rose, Withania, potato, onion, aloe and tulip, how many plants have hypogynous flower?
Six
Ten
Fifteen
Eighteen
Besides paddy fields, cyanobacteria are also found inside vegetative part of
Pinus
Cycas
Equisetum
Psilotum
Which one of the following is not a correct statement?
Herbarium houses dried, pressed and preserved plant specimens
Botanical gardens have collection of living plants for reference
A museum has collection of photographs of plants and animals
Key is a taxonomic aid for identification of specimens
Age of a tree can be estimated by
its height and girth
biomass
number of annual rings
diameter of its heartwood
