Answer: A half-shaded circle represents that a person is a carrier of the trait.
The correct answer is Robert Koch.
He was a German scientist and is globally known as one of the fathers of microbiology and bacteriology. He is famous for his work with anthrax, finding out the causative agent of the fatal disorder to be Bacillus anthracis. He received a Noble prize for his work in 1905. He also gave four postulates known as Koch's postulates.
The four characteristics that were formulated by Robert Koch to determine the causative agent of a specific disorder are:
1. The pathogen or microorganism must be must be found in all the cases of the disorder.
2. The pathogen can be withdrawn from the affected host and can be developed in pure culture.
3. The pathogen from the pure culture must result in a disease when incorporated into a vulnerable, healthy laboratory animal.
4. The pathogen must be reisolated from the novel host and demonstrated to be similar to the originally inoculated pathogen.
The fundamental building blocks of life are cells. No matter how large or little, straightforward or complex, the cell hypothesis holds true for all living things. Cells are believed to be a component of all living things, hence they can reveal information about all life.
Schleiden and Schwann advocated spontaneous generation (also known as abiogenesis) as the mechanism for cell origination, but spontaneous generation was later demonstrated to be false. The famous phrase "Omnis cellula e cellula" by Rudolf Virchow "Only pre-existing cells can give rise to new ones." However, the portions of the hypothesis unrelated to how cells first formed withstood scientific investigation and are currently accepted by the majority of scientists. The following are the elements of contemporary cell theory that are commonly acknowledged:
The basic unit of structure and function in living things is the cell.
One or more cells make up every living thing.
Through cellular division, new cells are created from existing ones.
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They are both types of acid.