Unlike other gymnosperms, Gnetum possesses vessels in its xylem, a characteristic typically associated with angiosperms. Vessels enable efficient water transport and represent an advanced evolutionary trait. This makes Gnetum an exceptional case among gymnosperms.
LIST I (Photoperiodism) | LIST II (Explanation) |
---|---|
A. Short Day Plants (SDP) | I. Dark period period of 14-16 hours |
B. PR | II. Absorbs light at 730-735nm |
C. Long Day Plants (LDP) | III. Daylight of about 14-16 hours |
D. PFR | IV. Absorbs light at 660-665nm |
Europium (Eu) resembles Calcium (Ca) in the following ways:
(A). Both are diamagnetic
(B). Insolubility of their sulphates and carbonates in water
(C). Solubility of these metals in liquid NH3
(D). Insolubility of their dichlorides in strong HCI
Choose the correct answer from the options given below: