B. photosynthesis is the major source of oxygen.
The overuse of fertilizers and over-enrichment with nutrients will lead to increasing the amount of phosphorus concentration in agricultural runoff.
Answer:
Stems and root
Explanation:
Auxins facilitate stem elongation while inhibiting axillary bud formation, ensuring apical dominance. The root, branches, and stem and tip all contain them. Hydroxy Acetic Acid is a perfect example. Auxin is indeed a growth hormone that facilitates cell elongation and is formed in the stem tip.
There are several "downsides" to extensive use of synthesized nitrogen-containing fertilizers; it contributes to algal blooms and dead zones in bodies of water, nitrogen is usually considered as a highly effective and economical fertilizer. However, the repeated use of the chemical can cause an imbalance in the pH of the soil, eventually leaving it unusable for growth of any kind.