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On April 14, 1865, John Wilkes Booth shot President Abraham Lincoln in the back of the head. Lincoln was attending a play, Our American Cousin, at _____________________ in Washington, DC. He died the next day from the wound.

 Jim Crow Laws 

Invented the first reaper for harvesting grain.

What will be printed out by the following code? Assume each class is in its own source code file. 1   public class Test,{2     public static void main(String[],args) {3       ClassA[] list = {new ClassA(),,new ClassB(), new ClassC()};4       for (ClassA item :,list)5         System.out.println(item + “: ” + item.pay());6     } // end main7   } // end class Test89   public class ClassA,{10  public String pay() { return “monthly pay”;,}11  public String toString() { return “A”; }12  }1314  public class ClassB,extends ClassA {15    public String,toString() { return super.toString() + super.toString(); }16  }1718  public class ClassC extends,ClassB {19    public String pay() { return “1/10 bonus plus” + super.pay(); }20  }

What will be printed out by the following code? 1   List list = new ArrayList();2   list.add(“A”);3   list.add(“B”);4   list.add(“C”);5   list.add(“D”);6   for (int i = 0; i< list.size(); i++) {7     list.remove(i);8     System.out.println(list);9   }  

Complete the Java program given below which searches and display selected daily weather records. The method should handle invalid input, like empty input (including input with only spaces) and non-numeric input. The program should report each error (can use the same message) with an Alert and abort the processing.   You must call the getRecordsWithin() method from the last question and use it properly to receive full credit. Assume the getRecordsWithin() method and all relevant classes work properly, regardless of what you wrote in the last question (i.e. do NOT rewrite implementation of getRecordsWithin() method here. Assume it already exists.).   Requirements: Your program should mimic the given sample sessions. Do NOT modify the given code, otherwise you will lose points. Just add code to appropriate places and specify where it should be added (#1, #2, #3 or additional place(s) in the program). No need to add additional GUI components or handle layout.   Figure 1. Startup screen.     Figure 2-1. A valid search with multiple records returned.     Figure 2-2. A valid search with no records. “Your search returned 0 records” is displayed.     Figure 3-1. An invalid input: empty input (including inputs with only space characters)     Figure 3-2. An invalid input: non-numeric input “6th” Reference: all methods listed here are instance methods unless explicitly noted class java.lang.Stringint length()boolean isEmpty()char charAt(int index)   // returns the char value at the specified indexString substring(int from, int to)  // returns the substring beginning at index from and ending at index to-1String trim() // returns a string whose value is the calling string object, with all leading and trailing spaces removed class javafx.scene.control.TextField/TextArea String getText()void appendText(String value)void setText(String value) class Integerstatic int parseInt(String s) // throws NumberFormatException class Doublestatic double parseDouble(String s) // throws NumberFormatException   Here is the given program: … // imports not shownpublic class Test extends Application { public static void main(String[] args) {    launch(args); } //———————— private WeatherReport dwr = new WeatherReport(); private TextField inputField; private TextArea resultArea; // #1 //———————— public void start(Stage stage) {    BorderPane root = new BorderPane();    root.setPadding(new Insets(10, 10, 10, 10));      Label promptLabel = new Label(“Find records with daily highTemp \nand lowTemp diff no more than: “);    inputField = new TextField();    Button searchButton= new Button(“Search”);    searchButton.setOnAction(e -> process());    HBox topRow = new HBox(5, promptLabel, inputField, searchButton);    root.setTop(topRow);    resultArea = new TextArea();    root.setCenter(resultArea);      // #2    stage.setScene( new Scene(root) );    stage.setTitle(“Weather Report”);   stage.show();   } // display an alert with the specified header text and content msg, // and wait for an acknowledgement private void displayAlert(String headerMsg, String msg) {    Alert alert = new Alert(AlertType.ERROR, msg);    alert.setHeaderText(headerMsg);    alert.showAndWait();  }  // #3} // end class Test

If you accumulate 6 absences, you may be administratively dropped from this course. 

To answer this question, you will need the Table that follows this question on the next slide. For the following nucleotide sequence of DNA:                                                               TACGATCAGATT     1.  Give the complementary sequence of DNA for the opposite strand of the double helix listed above:   [sequence1]     2.  Give the sequence of mRNA that would be transcribed from the strand I gave you at the top.    [sequence2]      3.  List the first codon of the mRNA sequence.  [sequence3]      4. Identify the STOP codon, if one is present and identify its function.  [sequence4]       5.  Translate the entire mRNA sequence (from question 2) into the amino acid sequence of the protein using the genetic code table found on the following slide.  [sequence5]  Read your mRNA strand left-to-right.      Be sure to read your mRNA strand left-to-right when answering all of the questions.  

  Java Frogs from Indonesia   In honor of Finals Week, we’re hanging out on a limb with these four Javan tree frogs in Indonesia. Tree frogs are smaller than your average terrestrial frogs because they spend the majority of their lives perched in trees, and their weight must be fully supported by twigs and leaves. At the rounded ends of their froggy fingers and toes are disc-shaped adhesive pads that help them to maneuver about on trees. Each of these frogs went through a complete metamorphosis, starting out as one of about 50 eggs in a clutch nestled in foam. Tree frog mothers tend to lay their eggs on the leaves of branches hanging over streams, ponds, or lakes. When the eggs hatch, the tadpoles then drop into the water below. The tadpoles mature into frogs and end up hanging out with their frog cousins on limbs like this one. Never having seen one of these tree frogs, think about what you already know about them: cell structure, cell respiration, how they produce new DNA & proteins, how they carry out cell division and some aspects of sexual reproduction — YOU HAVE LEARNED ALOT THIS SEMESTER to apply to new and different situations!!

Genetic diversity is of value to a population because: