While Louis Pasteur was the one that procured the germ theory of disease that explains that diseases are caused by microorganisms, the first researcher that provided direct experimental data to support the said theory is Robert Koch.
Robert Koch developed a criteria for the causality of disease from microorganisms called the Koch's postulates. The Koch's postulates indicate that:
(1) The bacteria must be present in every case of the disease
(2) <span>The bacteria must be extracted and isolated from the host with the disease and should be directly visualized and/or grown in culture
(3) There must be a healthy experimental host that will reproduce the disease once the isolated bacteria is injected
(4) The bacteria should be recoverable from the previously healthy host
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If you're talking about excel then you would select the cell with the label you want and click "Format Painter". Then, you click and drag it down the first 10 and it will automatically apply that same label to all the cells.
Answer:
The answer to 1. is option a. asexual portion.
The answer to 2. is option b. sexual portion.
The answer to 3. Is option a. Mosquito
Explanation:
1. The asexual portion is the stage in the Plasmodium erythrocytic cycle where the parasite develops in the erythrocytes causing accumulation of waste and toxic substances which ultimately end up in the bloodstream when the infected cells lyse. These factors acts to produce the symptoms experienced in malaria.
2. During the sexual portion of the Plasmodium cycle spores formed in the human host are released into the bloodstream which is usually picked up by an uninfected female anopheles mosquito when it takes a blood meal.
3. An infected mosquito passes the sporozoites to a new human host when it takes a blood meal and the cycle starts all over.
Answer:
TT, TT, Tt, Tt
Explanation:
Putting it in a Punnett square:
T t
T TT Tt
T TT Tt
Answer:
A. A majority of scientists agreed with it
Explanation:
The famous theory called the theory of common descent, states that all the living organisms of the earth have arisen from a common ancestor. This notion was first proposed by a French mathematician,Louis Maupertuis duirng 1740s who was of the view that all organisms had a single ancestor and evolutionary process with the passage of time resulted in the specie diversification.
After that, in 1790s another philosopher Immanuel Kant, suggested that all organisms seem to have a common ancestor. In the same period of 1790s, another scientist , Erasmus Darwin who was the grandfather of Charles Darwin also suggested that all the organisms might have a single ancestor who went through the process of evolution to bring all the majesty into life.
Charles Darwin was the first scientist who worked on this notion for alot of time and proposed the theory of common descent,in his book, On the Origin of Species.
After it, many scientists got agree with this theory such as, Vernon Kellogg in 1907 and T. Ryan Gregory in 2008 and many others explain that no reliable observations exists which contradicts the theory of common descent.
Therefore, option A is the best option.
Hope it helps!
