Concept explainers
a.
To describe: The type of selection represented by the population with higher survival and reproduction of giraffes with longer necks compared with those with shorter necks.
Introduction: Natural selection of the population could be of three types- Stabilizing selection, directional selection, and disruptive selection.
b.
To describe: The type of selection represented by the population with higher survival and reproduction of cattle with intermediate calf weights compared with those with high or low calf weights.
Introduction: Natural selection is a driving force of evolution where stabilizing selection follows an evolutionary trend; directional favors one extreme and disruptive created variation.
c.
To describe: The type of selection represented by the population with higher survival and reproduction of grasshoppers with either small or large mouthparts, compared with those with intermediate-sized mouthparts.
Introduction: Natural selection favors the survival of the fittest. In an environment, a population could experience either of the three selection types- disruptive, stabilizing or directional.
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