A Mediterranean island experiences a decline in its annual r…

A Mediterranean island experiences a decline in its annual rainfall.  As a response to drier conditions, trees on the island produce thicker, more fibrous seed pods.  A researcher studying the birds on the island notices that in subsequent years, most of the birds have deeper and wider beaks.  She hypothesizes that these larger beaks let birds effectively eat the thicker seed pods.  Which mode of natural selection does this example illustrate?

Which binomials are factors of the polynomial shown?  The x…

Which binomials are factors of the polynomial shown?  The x-axis spans from negative 4 to beyond 2, and the y-axis spans from below negative 5 to 10. The x-axis has a scale of 2 in increments of 0.5 and the y-axis has a scale of 5 in increments of 1. The green polynomial function has a local minimum at (negative 2, 0) and a local maximum at (0, 8). The function decreases from the top left of the second quadrant, reaching its minimum, then increases to its maximum on the y-axis before decreasing again, passing through the point (1, 0) and continuing into the fourth quadrant. The curve continues to extend out of view in both directions.