Nhận biết (M1)

Many plants have leaves that are larger on one side of their long central axis than the other, a

phenomenon known as asymmetrical orientation. University of California, Berkeley biologist Ciera

Martinez and colleagues examined several species of grapevines and closely related plants, which have

leaves that grow in pairs, to see if both leaves in a pair tend to be oriented toward the same side (that is,

have more tissue on the same side) or not. They found that opposite-side orientation was much more

common than same-side orientation; in the Amur grape, for example, approximately ____.

Which choice most effectively uses data from the graph to complete the example?

• A.

  150 leaf pairs show opposite-side orientation, whereas approximately 60 pairs show same-side

• B.

  110 leaf pairs show opposite-side orientation, whereas approximately 45 pairs show same-side

• C.

  650 leaf pairs show opposite-side orientation, whereas no pairs show same-side orientation.

• D.

  110 leaf pairs show opposite-side orientation, whereas no pairs show same-side orientation.