Answer:
Alfred Hershey and Martha Chase
Explanation:
In 1952 Alfred Hershey and Martha Chase were working with bacteriophages or phages, which are viruses that infect bacteria. They knew that a phage had an outer shell of protein and an inner core of DNA. In addition, from the electron microscope observations, they also knew that during infection the virus attacks the bacterium by its tails and introduces its genetic material into the bacterium to multiply using its metabolic machinery. They radioactively labeled two sets of phages: one with 32P (which marks only DNA) and another with 35S (which marks only proteins). In two parallel experiments, they infected bacteria with viruses marked on their DNA and with viruses marked on their proteins. The cultures were shaken with a mixer to separate the virus particles from the bacterial coatings. They then performed a centrifugation to separate the phages from the bacteria, so that the larger and heavier bacteria remain in the pellet, while the phages remain in the supernatant. They found that the radioactivity of 35S appeared in the supernatant while that of 32P appeared in the sediment, from which new radioactively labeled virus particles appeared, demonstrating that DNA was the genetic material.
No because the offspring has a 50/50 chance of having black fur x
Answer:
Technology uses science to solve problems, and science uses technology to make new discoveries. Although they have very different outcomes, science and technology are able to work hand in hand, and each helps the other advance.
Answer:
c. platelets - phagocytize
Explanation:
Platelets are blood cells also known as thrombocyte, that helps with blood clotting to stop bleeding. In the case of an injury that leads to blood vessel damage, signals are sent to the blood platelets, once the signals are sent, the platelets and other coagulation react to the blood vessel damage and they form they initiate a plug (clot) to fix the blood vessel damage.
The are usually not involved in phagocytosis, the phagocytes including macrophages, monocytes, granulocytes, and dendritic cells are involved in phagocytosis
A lava dome would most likely be composed of a very viscous lava rich in silica like a rhyolite which would cause it to dome upwards and solidify quickly rather than spread out over the surface of the earth like a fissure eruption which more likely would be like a basalt much less viscous and flowing more freely.
