A scientist shines low levels of ultraviolet radiation on a dish containing colonies of ruby-red bacteria. He then makes several replicate plates from this dish over many generations. He finds that in addition to the ruby-red color, there are also pink, orange, and yellow bacteria. Which of the following is the best explanation for these findings?

A. Mutations occurred in the gene for color of the bacteria, which were passed on to successive generations.
B. The scientist selected new types of bacteria by making plates of successive generations over time.
C. One bacterial colony changed its color to better blend in to the media.
D. Natural selection produced the changes in the bacterial color.

the atomic number of magnesium is 12. its nucleus must contain 12 protons and no electrons. the atomic number of an atom is determined by the number of protons.

magnesium is an electrolyte injection commonly used to treat low magnesium levels in your blood. it is also used to prevent or control seizures in women with preeclampsia or eclampsia.

answer: the correct option is d. enzyme

lactase and carbonic anhydrase are the examples of enzymes.

lactase is an enzyme, which is present in the small intestine of mammals. it in the digestion of the disaccharide, lactose ( milk sugar) by converting it into two monosachharide, which are glucose and galactose.

carbonic anhydrase is present in the red blood cells. this enzyme plays significant role in the transport of co₂. it in the conversion of co₂ and h₂o into carbonic acid, which is then dissociated into bicarbonate ions and hydrogen ions.

the  different  of  these  two  are  that  they  differently  handle  their  team.

an  expressive  leader  focuses  on  the  task  at  hand  and  make  sures  that  their  goal  is  achieved.  they  accurately  finish  the  task.  an  instrumental  leader  on  the  other  hand  works  on  the  unity  of  the  group,  they  care  more  about  their  employees.  all  the  while  creating  a  good  environment.