Julius Von Sachs and Plant Organ-forming Substances

Who proposed the idea of chemical messengers being responsible for the formation and growth of plant organs?

What term did Julius Von Sachs use to refer to the chemical messengers responsible for organ formation in plants?

In what decade was the first chemical messenger, auxin, identified in plants?

Which of the following is NOT one of the major classes of chemical messengers identified in plants?

What is another common name for plant hormones or growth regulators?

According to Julius Von Sachs, what external factor could affect the distribution of organ-forming substances within a plant?

Which plant hormone was the first chemical messenger identified in the 1930s?

What term is commonly used to refer to the substances that trigger or initiate biochemical processes resulting in organ formation or growth in plants?

Which of the following external factors did Julius Von Sachs suggest could influence the distribution of organ-forming substances within a plant?

What did Julius Von Sachs call the substances responsible for the formation and growth of different plant organs?

Which of the following classes of chemical messengers is NOT one of the five major classes identified in plants as mentioned in the text?

What concept did later work suggest instead of specific organ-forming substances being present in plants?