The photograph shows a laboratory investigator examining sam…

The photograph shows a laboratory investigator examining samples of DNA in a procedure called PCR, or polymerase chain reaction. Using PCR, the investigator can create thousands or even millions of copies of a fragment of DNA for closer investigation. In which of these situations would PCR be most useful? test 4 PCR pic.jpg

Scenario: You visit a kindergarten classroom. The teacher sa…

Scenario: You visit a kindergarten classroom. The teacher says, “I like my space to look child-friendly. So I purchased colorful, cute materials from a school supply catalog.” Walls are covered with several store-purchased posters such as large number posters, giant shapes and colors, and a big birthday calendar. There are two teacher created bulletin boards, one has an apple tree and states-WE ARE APPLE-SOLUTELY AWESOME. Another bulletin board has colored paper leaves falling from a paper tree and states-FALL IN LOVE WITH LEARNING. The teacher states, “I spent so much time on choosing and placing the wall items and creating the bulletin boards, and the children don’t even seem to notice them.” You also note that the room contains tables, desks, and several bookshelves. The teacher mentions that the principal has given each teacher a budget to make the classroom more homelike. Why do you think the children are ignoring the materials on the walls?