Answer/Explanation:
a. Directional selection is a form of natural <em>selection</em> that occurs when the conditions of an <em>environment</em> favors individuals of a <em>population</em> with an extreme trait that makes them have a <em>fitness</em> greater than other individuals with traits of lesser fitness that cannot survive and thrive well in the <em>environment</em> like the individuals with extreme traits that has greater <em>fitness</em>. In directional selection, the environmental condition of an <em>environment</em> favors the <em>selection</em> of individuals with a particular extreme trait only as against others with traits of less <em>fitness.</em>
b. Disruptive selection occurs when <em>selection</em> favors individuals of a <em>population</em> with extreme traits that has greater <em>fitness</em> to survive in an <em>environment, </em>while individuals of average traits with less <em>fitness </em>are selected against. <em>Selection</em> favors individuals of extreme values at both end of the spectrum.
c. Stabilizing selection occurs whereby, <em>selection</em> favors individuals of intermediate or average traits that has greater <em>fitness</em> to survive in an <em>environment </em>, while individuals in the <em>population</em> with extreme traits that have less <em>fitness</em> is selected against.
There are two main reason why ti took Magellan that long:
- First, he had to face the scrutiny that initiated by the spanish captain in his ship, so he had to waste several days in dealing with it
- second, the strait pathways is far more treacherous that what Magellan had imagined, making it really hard to navigate the ship.
Ethnographic research continues to provide a deep understanding of informants' everyday lives and cultures, due participant observation. Participant observation is type of method for collecting data in order to make qualitative research of cultures, people and processes. In this method <span>the observer participates in ongoing activities and records observations.</span>
Waren and Marshall hypothesis states that bismuth kills bacteria, thereby<span>healing gastritis and preventing ulcer relapse.</span>The Colloidal Bismuth Subcitrate (CBS) experiment provides evidence supporting Warren and Marshall's hypothesis because it showed that ulcer patients treated withbismuth had a substantially lower relapse rate than those treated with Tagamet.
