Answer:
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Answer:
The average trait value changed in one direction.(In this case, larger size)
Explanation:
In evolution a natural selection can be disruptive, directional or stabilizing
In stabilizing no extreme trait is favored hence provides intermediate values .
Disruptive selection both extreme traits are favored over the intermediate trait.
Directional, the enviroment will favor the survival of one trait hence a change in direction either towards the left or the right.
In the case of swallow cliff mortality, selection favored the larger size.
Answer:
Companion cell is a type of specialized parenchyma cell, which is located in the phloem of the flowering plants.
Each of the companion cell is usually associated with the sieve element. The main function of the companion cell is uncertain but it regulates the activity of sieve tube.
It plays a major role in the loading and unloading of the sugar molecules into the sieve element. As the sieve tubes do not have nucleus and ribosomes so they need companion cell to help in the transportation of sugar molecules.
The sociological perspective would view society as a living organism in which each part of the organism contributes to its survival and stability is the functionalist perspective.
Sociology makes a specialty of the systematic know-how of social interaction, social agency, social establishments, and social alternatives.
Sociology presents critical perception and perspective on the answer to social troubles. Sociology has modified our outlook in regard to the issues of crime, its reasons, and its results. Sociology is of wonderful importance to the expertise of worldwide problems.
Examples of sociology may want to include reading about the relationship between lifestyle and society, examining social movements, or discovering how communique affects human behavior.
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