For respiration in plants during daytime, Oxygen is provided by…….
a) environment
b) water
c) O2 produced by plants
d) all of these
During day time, CO2 is provided for photosynthesis by……
a) environment
b) produced during respiration
c) absorbed water from soil
d) both a and b
During night, which of the following cells of plant carry down respiration?
a) mesophyll
b) stem cells
c) xylem and phloem cells
d) all cells
During night which of the following cells of plant carrying out photosynthesis…..
a) mesophyll
b) stem cells
c) xylem and phloem cells
d) none of these
The outer surface of the root, stem and leaves is called….
a) epidermis
b) cuticle
c) guard cells
d) lenticels
A thick………layer is present over
epidermis which allows gaseous exchange in plants.
a) cuticle
b) bark
c) mesophyll
d) lenticels
