Answer:
Food supply
Explanation:
foods will become toxic and can lose their freshness and value, especially for foods that are of higher quality
The wind chill index attempts to tell us what it "feels like" in cold, windy conditions. This index usually indicates the temperature it feels like outside to animals and people. It is also the rate of heat loss when the skin is exposed due to temperature and wind.
If it is metallic. I know this because luster has to o if it is shiny, and a metallic mineral is shiny.
Answer:
E. Erwin Chargaff >> Discovered that there were equal amounts of the nitrogen bases A T and C G in a human body cell; concluded that A paired with T and C paired with G
B. Hershey and Chase>> Did experiments with viruses to determine that DNA, not protein, is the genetic material of a cell
A. Frederick Griffith>> Did experiments with S and R strain pneumonia bacteria to determine that DNA is the genetic material of a cell
C. Rosalind Franklin >> Took x-ray crystallography images of a DNA molecule.
Explanation:
Chargaff rules helped to determine the double helix structure of the Deoxyribonucleic acid (DNA), i.e., the genetic material of prokaryotic and eukaryotic organisms. Chargaff indicated that DNA from any species contains a 1:1 ratio of purine bases (Adenine and Guanine) and pyrimidine bases (Cytosine and Thymine). Hershey and Chase provided evidence that the DNA, instead of protein, is the hereditary material. Hershey and Chase used radioactive phosphorus-32 in order to label the DNA of specific bacteriophages (T2), and they discovered that the DNA was responsible to generate progeny inside infected bacteria (i.e., DNA was hereditary material). Frederick Griffith observed that DNA molecule was the transforming factor that could be transferred to innocuous <em>Streptococcus pneumoniae</em> bacteria in order to convert them into deadly bacteria. Finally, Rosalind Franklin obtained the first X-ray image that showed the diffraction pattern of a crystallized DNA molecule, which was used by Watson and Crick to propose that DNA had a double helix structure.
