The guppy is a species of small freshwater fish. Many years of scientist observations revealed that the average size of guppies
in a pond, decreased. It was surmised that this decrease was due to the introduction of a natural predator. Which of the following best explains the change in guppy size? a natural selection - scientists influenced the average size of the guppy to protect the species b genetic mutation - a change in DNA occurred causing a decrease in average guppy size c natural selection - smaller guppies became less visible to predators d selective breeding - predators select prey based on preferred traits
<u>Answer</u>: c natural selection - smaller guppies became less visible to predators d selective breeding - predators select prey based on preferred traits.
In nature, predators prefer larger individuals. They will provide sufficient nourishment, not only to compensate for the used energy during the hunt, but also to sustain the individual for a period of time. Smaller individuals are hunted only if they are infants and thus vulnerable and easily caught.
Thorugh the introduction of the predator, being small became evolutionary advantageous. Thus, large guppy where preyed upon and did not succeed in reproducing. However, small guppy survived and reproduced successfully, thus passing on their genes. The next generation will be composed by the offspring of the smaller fish.
<span>The
nurse should start by introducing the staff nurses to the mother and the
partner and also try to make the feel at home. The client is actually in the
early stages of the labor and she and the fetus were examined and were both
found to be stable. At this time, the most important thing is to build a
trusting relationship between the client and the partner so as to allay anxiety.</span>
Controls the movement of substances in and out of cells<span>. The basic </span>function<span> of the </span>cell membrane<span> is to protect the </span>cell<span> from its surroundings.
