Tutor profile: Juan C.
Give an example of the subjunctive tense.
The subjunctive tense is used to express things that give doubt, uncertainty, and subjectivity. For example: "I hope that Pedro goes to school tomorrow". This shows uncertainty, so it requires the subjunctive. "Yo espero que Pedro vaya a la escuela mañana." This is the subjunctive of the verb "ir" or "to go."
What is the "warrior gene"? How does this gene explain behavior?
The name of the “warrior gene” is Monoamine oxidase A. It has been linked to aggression in past studies. More specifically, people with low activity of MAOA gene are more likely to react aggressively. This abnormality (because it is less common in the population) is the result of a missense mutation of one nucleotide of the gene. This is an example of a biological way to explain behavior. For example, the "warrior gene" could explain why some people may behave more aggressively than others. Nevertheless, it is important to consider other domains that can explain behavior such as the cognitive, intrapsychic, sociocultural, and dispositional domains.
Describe the biological process behind the concept of crenation.
Crenation is the shriveling of cells caused by differences in solute concentration between the internal (cellular) and external (extracellular) environments. When the solution surrounding the cell is hypertonic or there is a higher solute concentration outside of the cell, the water inside the cell will diffuse outside the cell. This is because of osmosis, which is the passage of water from a less concentrated environment to a more concentrated environment. As a result, when the water leaves the cell, it will shrivel. Think about it this way: water will always look for the more concentrated environment.
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