Which of the following supports a dense population of plankton and littoral vegetation?
Oligotrophic
Eutrophic
Lithotrophic
Agroecotrophic
In which one of the family formations of endosperm doesn’t take place?
Orchidaceae
Cactaceae
Ranunculaceae
Malvaceae
Source of commercial chewing gum latex is
Hevea brasiliensis
Carica papaya
Ficus elastica
Achras sapota
Which one of the following is not a flower?
Shoe-flower
Sunflower
Larkspur
Water lily
B.
Sunflower
Sunflower (Helianthus annuus) is a member of the Asteraceae family. Its flower is not a real flower but a whole inflorescence having a group of many small flowers. This inflorescence is known as capitulum or head inflorescence.
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