Question

The first scientist associated with the discovery of auxins in plants is:
A. Haagen smit
B. Boysen-Jensen
C. Darwin
D. Yabuta

Answer 1

Hint: It is already known that the primary leaf penetrates the seed covers and the soil although protected by the coleoptile at the moment in which the grass seeds germinate. It is also the time where the seed is surrounded by a hollow cylindrical sheath. It is experimentally proven that the coleoptile halts budding and the primary leaf impales it, as soon as the seedling has grown above the surface.

Complete answer:
It was the scientist Darwin who discovered that the tip of the coleoptile plays an important role in phototropism but that the meandering takes place in the section below the tip. In fact, it was actually Charles Darwin and his son Francis who made progress in discovering the phototropic stimulus is present at the tip of the plant.
The automobile industry initialised the crankcase ventilation which is known to the first vehicle emissions control system with the help of Haagen-Smit.
In 1885, indole-3-acetic acid was discovered by the scientists Salkowski in fermentation media. Actually, Yasuhiko Yabuta was known to be the former football pitcher.
Research led the to install positive, the
So, the correct answer is “Option C”.

Note:
Most people already know that the scientist Charles Darwin (1880) was one of the great and famous evolutionists in history. He was the sentient who had theorized the presence of growth ingredients in florae. 'The power of movement in plants' which was one of his famous books, describes the experiments made by him which concerns the evolution movements in canary grass. The scientist Darwin has designated He had perceived the unilateral meandering of the shoot tip (which is called as coleoptile) in the direction of the source of light.