-The figure above shows the cross section of a root grown under different conditions. Explain what is happening in picture B?
A)With no oxygen, the root has died.
B)The root is infested with parasites that are eating the root.
C)Root cells produce absicic acid to increase tolerance to low oxygen.
D)Root cells produce cytokinins to promote movement of nutrients to roots.
E)Low oxygen stimulates production of ethylene which causes apoptosis in some cells of the root cortex.

Question

-The figure above shows the cross section of a root grown under different conditions. Explain what is happening in picture B?
A)With no oxygen, the root has died. 
B)The root is infested with parasites that are eating the root. 
C)Root cells produce absicic acid to increase tolerance to low oxygen. 
D)Root cells produce cytokinins to promote movement of nutrients to roots. 
E)Low oxygen stimulates production of ethylene which causes apoptosis in some cells of the root cortex.

Quizplus · Accepted Answer

Low oxygen conditions stimulate the production of ethylene, which can lead to programmed cell death (apoptosis) in some cells of the root cortex, allowing for better oxygen diffusion.

-The Figure Above Shows the Cross Section of a Root