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
A.
actinomorphic, hypogynous with twisted aestivation
Actinomorphic or star-shaped can be divided into 3 or more identical sectors, which are related to each other by rotation about the centre of the flower, e.g., China rose.
Zygomorphic flowers can be divided by only a single plane into two mirror image halves, e.g., orchids.
Valvate aestivation The sepals or petals in a whorl just touch one another at the margin, e.g., Calotropis
Twisted aestivation One margin of the appendage overlaps that of the next one, e.g., China rose.
lmbricate aestivation the margins of sepals or petals overlap but not necessarily in specific direction, e.g., Cassia.
Interfascicular cambium develops from the cells of
medullary rays
xylem parenchyma
endodermis
pericycle
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
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
Age of a tree can be estimated by
its height and girth
biomass
number of annual rings
diameter of its heartwood
Besides paddy fields, cyanobacteria are also found inside vegetative part of
Pinus
Cycas
Equisetum
Psilotum
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
