Crossing-over never occurs between genes. Hope this helped :)
Answer:
Radioactive phosphorus (32P) was present inside the host bacteria.
Explanation:
Hershey and Chase's experiment provided evidence that DNA carries genetic information. Alfred D. Hershey and Martha Chase (1952) used radioactive phosphorus (32P) and radioactive sulfur (35S). They infected the cells of the bacteria <em>E. coli </em>with the T2 bacterial virus (bacteriophage). They observed the presence of radioactive phosphorus-containing DNA of the viral particle inside the infected bacterial cells.
On the other hand, the sulfur-containing protein of the viral coat was not detected inside the infected bacterial cells. This proved that the viral DNA enters the host cell and carries genetic information for viral replication.
Answer:
1. In order to fix the bacterial to the slide;
<u>so that it will not be lost during the staining procedure.</u>
<u>so that false impression or result will not be given by the bacteria in water,</u>
<u>Distilled water is used to prevent contamination with impurities e,g metals ions and crystals</u>.
Explanation.
In smear preparation; the bacterial cells should also be well dispersed,so that they do not clumped together to form' big glob'.(large round masses) The later affect clear field view of the bacterial mophology, affected staining, and therefore gives inaccurate results,
Fixing to the slide also affects the morphology of bacterial cells, through shrinking in size, which can lead to loss of structural characteristics and extra-cellular matrixes,
