Answer:
They used radioactive labeling techniques to build two different types of phage.
Explanation:
In 1952, a set of experiments were carried out by American biochemists Alfred D. Hershey (1908-1997) and Martha Chase. They prepared two separate virus samples, one contained DNA labeled with a radioactive isotope and the other contained protein labeled with a different radioactive isotope. They grew the two types of viruses separately, infected bacteria with the two sets of phages and analyzed the bacteria for radioactivity. From the results obtained, Hershey and Chase concluded that the viral genetic material was DNA and not protein, reinforcing the observations previously made by Avery.
Answer:
Almost all the animals can heal wounds, but only some can regenerate. One hypothesis is that certain regeneration-specific genes are expressed exclusively in regenerative species and evolutionarily lost in nonregenerative species.
Explanation:
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<span>In Mary's case, the abducens is affected/ The abducens is a motor neuron that is responsible for innervating the lateral rectus muscle, this helps the pull the eye in a lateral direction. In Mary's case, only the right branch of this is affected so when she looks right the eye is simply not able to rotate laterally and she has double vision. The medial rectus muscle that is found in the right eye is responsible for pulling the eye so that she can look left. The oculomotor nerve is in charge of innervating this particular muscle and when it comes to mary's case, her cranial nerve III is not affected.</span>
Answer:
The lowest level, which is usually the producers.
Explanation:
This is because on every level of the trophic system, some energy is lost before the next level. So the level with the least lost energy is the lowest