In the 19th century, Gregor Mendel performed a series of experiments on pea plants that led to the establishment of the field of
genetics. He determined that genetic information is passed from a parent to its offspring during reproduction. He did not know how
this information was stored or transmitted from one organism to another.
Almost 100 years later, Oswald Avery did experiments on mice using virulent pneumonia and discovered that the transmission of
genetic characteristics from parent to offspring is done through the inheritance of DNA molecules.
A few years after Avery determined that DNA was the molecule used for the storage and transmission of genetic information, James
Watson and Francis Crick used data from X-ray studies to create an accurate model of the structure of DNA.
ad or the storage and acti on aren
Based on the paragraphs above, it can be concluded that
OA. scientific research is always done separately and independently of all other scientific knowledge.
B. scientific knowledge has not changed at all over the past two centuries.
c. over time scientific knowledge is reevaluated and extended through new scientific research.
OD. once a scientific theory has been established there cannot ever be any new scientific research done on the subject.

This is a very easy paragraph analysis question. The answer is c. "Over time, scientific knowledge is reevaluated and extended through new scientific research." The reason why the answer is C., is because the chronological order of the study of genetics is as follows:

- Mendel does his pea plants experiments, but did not know how traits were passed to the offspring.

- Avery concludes that DNA is the "material" that passes on traits to the offspring, probably using Mendel's research and his own research (pneuonimia virus research) as well.

- Since the existence of DNA was published, Watson and Crick used it to identify an accurate model of the structure of DNA, using the four bases: cytosine, adenine, guanine, and thymine.

Overall, we see a trend of scientists publishing results based on what scientists did before.

a. the production of carbon dioxide through the process of photosynthesis

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.