Question

The law of minimum was proposed by:
A. Priestly
B. Liebig
C. Hill
D. Blackman

Answer 1

Hint: This law states that the rate of growth of a plant depends on the number of essential nutrients available to it.

Complete answer: The law of minimum was proposed by Justus von Liebig.
This law states that the rate of growth of a plant (the size to which it grows and its overall health) depends on the number of essential nutrients that are available to it.
This concept was a hypothesis that was originally applied to plant/ crop growth.
Here, it was found that increasing the number of plentiful (non-essential) nutrients did not increase plant growth and development. The rate of plant growth and development was only affected (increased) by increasing the amount of limiting/ essential nutrients.

So, the correct answer is “Option B”.

Note: 1. Sir Joseph Priestly discovered the need for oxygen in the process of photosynthesis.
He discovered 10 new gases.
For example, nitric oxide, nitrogen dioxide, nitrous oxide (laughing gas), hydrogen chloride, ammonia, sulfur dioxide, silicon tetrafluoride, etc.
2. Frederick Blackman introduced the concept of dark reaction in the process of photosynthesis.
It is thus also known as Blackman's reaction.
He stated that when a process is conditioned as to its rapidity by a number of separate factors, the rate of the process is limited (determined) by the pace of the slowest factor.
3. Robert Hill discovered that the green particles obtained from broken/ lysed cells could produce oxygen from water in the presence of light and a chemical compound such as ferric oxalate.
These compounds were able to serve as an electron acceptor in the electron transport system of the light-harvesting complexes (LHCs). This process is known as the Hill reaction.