Question

What is a stress hormone? Or the hormone produced during adverse condition is
A) Benzyl aminopurine
B) Dichlorophenoxy acetic acid
C) Ethylene
D) Abscisic acid

Answer 1

Hint: Stress hormone is cortisol that is released by adrenal glands and it helps humans to deal with the stressful situation. The reaction of stress leads to the release of different types of hormones in the body like catecholamines, glucocorticoids, prolactin, and growth hormone.

Complete answer:
Let us study the options to find the correct answer:
Option A: Benzyl aminopurine is a type of molecule which is the first cytokinin of generation synthetic that promotes the development responses and plant growth and by stimulating cell division it helps in setting blossom and stimulate the richness of fruit development. Therefore, this is an incorrect answer.

Option B: Dichlorophenoxy acetic acid is a herbicide that causes uncontrolled growth for selectively killing most of the broadleaf weeds. It is one of the most widespread and oldest usable herbicides in the world. Therefore, this is an incorrect answer.

Option C: Ethylene is the simplest alkene and a hydrocarbon which is having the formula $C_2 H_4$. When it is pure it gives a sweet and musky type odor and a colorless flammable gas. It is the worldwide usable organic compound and has many applications in the chemical industry. Therefore, this is an incorrect answer.

Option D: During adverse environmental conditions, the hormone which is released is abscisic acid, in plants this acid is also responsible for the closure of stomata when the concentration of $CO_2$ is high under the water stress condition and in humans, it has an important role in the management of glucose homeostasis. Therefore, this is the correct answer.

Thus, the correct answer is option (D) Abscisic acid.

Note: Abscisic acid inhibits the synthesis of enzymes at translation level,imposes dormancy, promotes flowering in short day plants and nullifies the activity of plant growth hormones by promoting enzymes involved in abscission, dormancy.