The main form(s) of nitrogen taken up by plant roots and useful to plants is/are:
A. N-N.
B. nitrite.
C. nitrite and nitrate.
D. ammonia and N-N.
E. nitrate and ammonia.
E. nitrate and ammonia.
You might also like to view...
Which of the following statements about agricultural fertilizers is false?
A. Global nitrate and phosphate resources are in decline. B. Large amounts of fertilizers are necessary to maintain high crop yields year after year. C. Nitrate and phosphate runoff cause eutrophication in different communities. D. Phosphates are obtained exclusively through mining. E. If the human production of fixed nitrogen stopped, the amount of fixed nitrogen added to the biosphere each year would only be about half of what it is now.
At what point of replication initiation in bacteria does the primase act, and what type of synthesis is primed first, leading- or lagging-strand synthesis?
What will be an ideal response?
Which of the following is not an adaptation to bipedalism in early hominids?
a. curvature of the spine b. shorter pelvis c. alignment of the big toes with the rest of the toes d. decrease in the length of the legs relative to the arms e. moving the foramen magnum to the base of the skull
The structure that transports sperm cells from the epididymis to the urethra is the
A. vas deferens. B. ductus arteriosus. C. semen. D. prostate tubules.