The flow of air and water in or out of the mesophyll laye...
The flow of air and water in or out of the mesophyll layer of a leaf is controlled by the
stomata
lenticels
air space
guard cell
Correct answer is D
No explanation has been provided for this answer.
Excretion in Paramecium sp. is by diffusion because ...
Which of the following is not seen in the transverse section of a young monocotyledonous stem? ...
In animals the main protective covering is found in the ...
The following are involved in reflex action EXCEPT ...
Parasitism can best be defined as an association between two organisms in which ...
The correct sequence of biomes from northern to southern Nigeria is ...
Which of these has the most complex level of organization? ...
One of the ways of controlling noise pollution in urban areas is ...