Which of the following describes a positive feedback loop? a. When blood sugar concentration is too low, the endocrine system secretes hormones that increase blood sugar concentration to a normal level.
b. When the body senses that the heart rate is very high, it secretes hormones that decrease the heart rate.
c. When blood sugar concentration is too high, the endocrine system secretes hormones that decrease blood sugar concentration to a normal level.
d. When someone is exercising intensely, the body secretes hormones that increase oxygen supply for cellular respiration.

her next move would be to use agarose gel electrophoresis to separate the dna molecules of varying length and create a dna fingerprint.

answer;

c. a tree whose roots are surrounded by wet sand.

explanation;

water stress is an important factor limiting the growth and productivity of forests.water stress is the most often cited cause of poor survival and growth of woody landscape plants.

-insufficient soil moisture is the most common form of water stress, but excess moisture that leads to poor soil aeration (hypoxia) can also result in reduced plant vitality. a tree whose roots are surrounded by wet sand would be least likely to experience water stress.