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.
The burden of diseases A and B in country Z is that disease B has a higher prevalence than
disease A. That is option D.
<h3>Health statistics of Country Z</h3>
Health statistics is used by professionals to summarize the health status or information on the health of individuals in a particular geographical location.
The basic statistic tools that can be used to check the health status of a population are,
The prevalence rate is the total number of cases of a disease existing in a population divided by the total population.
The prevalence rate of disease A = 225 per 100,000 population while the prevalence rate of disease B = 500 per 100,000 population.
Therefore, the burden of diseases A and B in country Z is that Disease B has a higher prevalence than
disease A.
Learn more about prevalence here:
brainly.com/question/25151633
Answer:
True. You can get vitamin A as "preformed vitamin A" which is already active and/or you can get vitamin A as carotenoids which the body can turn into active vitamin A.
Explanation:
There are two different types of vitamin A that can be obtained from food:
1. Preformed vitamin A, which is already active, is found in animal products such as beef, fish, poultry and dairy products.
2. Provitamin A, which is the inactive form, is found in plant-based foods, such as fruits and vegetables. The most common type of provitamin A is β-carotene, which is a carotenoid that the body can turn into active vitamin A via an enzyme named β-carotene 15,15'-monooxygenase.
Answer: G)Vacuole
Explanation:
G)Vacuole is the answer. Hope this helps!
Answer:
A.Radiation is the answer
