Bacteriophages are viruses that infect bacteria. in an experiment, bacteriophages were labeled with either radioactive phosphorus or radioactive sulfur. the labeled bacteriophages were incubated with bacteria for a brief amount of time and then removed. the infected bacteria cells were found to contain significant amounts of radioactive phosphorus but not radioactive sulfur. based on the results of the experiment, which of the following types of molecules did the bacteriophages most likely inject into the bacteria cells? (a) simple carbohydrate (b) amino acid (c) dna (d) polypeptide unauthorized copying or reuse of any part of this page is illegal. go on to the next page. -9­

(C) DNA

Explanation:

This experiment shows that when bacteriophage infects bacteria, it only inserts its DNA (radioactive phosphorus is incorporated only in nucleic acid, while radioactive sulfur is incorporated only in proteins). Proteins with incorporated sulfur are located within the capsid of bacteriophage, which stays outside the bacterial cell.

d concave shape of wave rock

explanation:

the concave shape of wave rock is a very good evidence that supports the evolution of earth due to chemical weathering. if we talk about structure of   wave rock, studies have estimated that it is around 2.7 billion years old. it also serves as the foundation of evidence that it was the place where australian continent began to form.

how the structure of wave rock was created?

studies suggest that structure of wave rock was created when the surrounded area was started to weather due to which deposition of material started on the part of land which now contains wave rock.

the structure of wave rock is considered to be one of the best-known landforms in australia. at the height of around 15 cm, there can be found flared slopes which formulate the margins of hyden rock. it is now assumed by geologists that wave rock was created by subsurface water-induced weathering and not by glaciers, waves or wind.

due to deposition of material over the period of long time, the wave rock became tougher and tougher due to weathering from surrounding terrain. this makes it a physical evidence that supports   the evolution of earth due to chemical weathering.

hope it !

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.