In majority of angiosperms :
(1)reduction division occurs in the mgaspore
mother cells
(2) a small central cell is present in the
embryo sac
(3) egg has a filiform apparatus
(4) there are numerous antipodal cells

Which of the following is not a component of
downstream processing ?
(1) Preservation
(2) Expression
(3) Separation
(4) Purification

Methanogens belong to :
(1) Dinoflagellates
(2) Slime moulds
(3) Eubacteria
(4) Archaebacteria

The balloon-shaped structures called tyloses :-
(1) Are extensions of xylem parenchyma cells into
vessels
(2) Are linked to the ascent of sap through xylem
vessels
(3) Originate in the lumen of vessels
(4) Characterize the sapwood

Which is essential for the growth of root tip ?
(1) Ca
(2) Mn
(3) Zn
(4) Fe