Ascent of sap is the movement of …….through…….in plants.
a) food –phloem
b) water and mineral – xylem
c) both a and b
d) none of them
According to one theory, opening and closing of stomata is governed by…… ions.
a) Cl-
b) Na+
c) K+
d) Mg++
90% of the dry matter of translocated food is………
a) glucose
b) salts
c) sucrose
d) urea
Which of the following plants show highest rate of transpiration?
a) hydrophytes
b) mesophytes
c) halophytes
d) xerophytes
Common crop plants like wheat, rice etc. are ……..
a) hydrophytes
b) mesophytes
c) halophytes
d) xerophytes
Which of the following plants are also called succulent plants?
a) hydrophytes
b) mesophytes
c) halophytes
d) xerophytes
