Plants that are efficient at taking iron up from a calcareous soil are known to employ which of the following methods?
A) produce organic compounds that can form stable chelates with iron
B) produce reducing agents that reduce Fe3+ to Fe2+ in the rhizosphere
C) lower pH of their rhizosphere
D) all of the above
E) none of the above
D
You might also like to view...
Explain why farming and agriculture are not considered synonymous
What will be an ideal response?
Given: ?A = ?E; ?B = ?F; ?C = ?G; ?D = ?H. State whether the polygons are similar, congruent, or neither.
Fill in the blank(s) with the appropriate word(s).
Where is the reversing valve located in a split-system air-to-air heat pump?
a. Air handler b. Indoor coil c. Heat exchanger d. Outdoor unit
Bourdon tubes work by:
A) Straightening on a rise in pressure and curling on a fall in pressure. B) Curling on a rise in pressure and straightening on a fall in pressure. C) Vibrating at higher frequencies for higher pressures and lower frequencies for lower pressures. D) Twisting to the right on a rise in pressure and twisting to the left on a fall in pressure.