Source of commercial chewing gum latex is
Hevea brasiliensis
Carica papaya
Ficus elastica
Achras sapota
D.
Achras sapota
The latex of some plants is commercially important such as
(i) Source of commercial rubber is latex of Hevea brasiliensis, Ficus elastica, Cryptostegia. Maniho glaziou
(ii) Source of chewing or chickle gum is latex of Achras sapota
(iii) Source of enzyme papain is latex of Carica papaya
Which of the following is not the feature of gymnosperms?
parallel venation
perennial plants
distinct branches (long and short branches)
xylem with vessels
In which one of the family formations of endosperm doesn’t take place?
Orchidaceae
Cactaceae
Ranunculaceae
Malvaceae
Read the following statements and choose the correct option.
I. Leptosporangiate development of sporangium is found in all membersPteropsida.
II. Seed habit is shown by sellaginella.
III. Gnetum leaves are monomorphic and pinnately compound.
IV. Sporic meiosis is found in Volvolx, Chalmydomonas and Ulothrix.
Choose the correct option.
I and IV
I and II
I, II and IV
All of these
In coconut, the liquid endosperm is formed because
Karyokinesis is not followed by cytokinesis
Karyokinesis is followed by cytokinesis
Formation of the liquid endosperm is not dependent upon karyokinesis and cytokinesis
None of the above
Bacteria are considered plant because they
are green in colour
have rigid cell wall
have chlorophyll
have stomata
The edible dry fruit 'chigoza' is
fruit of Cycas
fruit of Pinus gerardiana
seed of Cycas
seed of Pinus gerardiana
