This is an excerpt from- Sexual selection and special design authored by Steven W Gangestad, in the Annals New York academy of Science. Answer the questions based on the excerpt provided below. "…..Women claim men’s scent importantly affects their attraction to them. Moreover, evidence suggests that women’s olfaction changes across menstrual cycle. For instance, women tend to rate androstenone, a steroid found in men’s sweat, more positively near ovulation than during non-fertile phases.
In an initial study, we asked 41 men to wear T-shirt for two consecutive nights. During the two-day period, they were to wash only with unscented soap, not to wear any fragrances or colognes, not eat certain strong foods, and not to sleep with another person. They dropped shirts off at our lab on a designated morning. Later that same morning and throughout the next day, women came in, smelled each T-shirt and rated its attractiveness (a composite of two ratings: pleasantness and sexiness). For each woman, we regressed her rating on men’s symmetry to yield "a preference for symmetry" score (the regression slope, a measure of the change in rating as a function of a change in symmetry). We then examined the correlation of these preference scores with women’s estimated fertility based on their self-reported day of the cycle and actuarial data on probability of conception for each day. Across 28 normally ovulating women the correlation was 0.54, p<0.001. Examination of the bivariate plot revealed that when women’s fertility was near zero (very early and late in the cycle), they had no systematic preference for the scent of either symmetrical or asymmetrical men. As their fertility increased, however, they increasingly preferred the scent of symmetrical men.
A subsequent study replicated and extended that result in a larger sample of about 50 normally ovulating women and 80 men. Women’s preference for symmetry correlated 0.42 with their fertility based on the day of their cycle, p<0.001. We asked men how many times they showered and whether they wore any fragrances. The number of times men showered predicted the attractiveness of their scent. When this variable was partialled out and all men who wore fragrances were eliminated from the analysis, the correlation between women’s symmetry and their fertility actually increased, r=0.48, p<0.001. In a third study in our lab, this result was once again replicated, r=0.26, p<0.05. When data from all three studies were pooled, the correlation between women’s preference for symmetry and the fertile phase of their cycle was r=0.40, p<0.0001." [Note: p values reported here means that correlation r is statistically significant]
From this scenario, the immune systems of humans should be exceptionally high. Yet, there is a rising incidence of autoimmune diseases and lack thereof immunity. What form of selection do you think is at play here? Explain.

Answers

Answer 1

Autoimmune diseases are rising despite the fact that humans should have exceptionally high immune systems. This can be explained by the fact that sexual selection is at play, leading to a reduction in immune function.

The excerpt explains the correlation between women's preference for symmetry and their fertile phase of their cycle. It is observed that women tend to prefer the scent of symmetrical men as their fertility increases. This indicates that women use scent as a factor in determining mating partners, which is an example of sexual selection.Sexual selection is a special type of natural selection in which individuals with certain traits are more likely than others to obtain mates.

This leads to traits that improve an individual's ability to secure a mate being favored, while traits that do not aid in mate selection are not favored.As a result, it is suggested that sexual selection may have favored traits that lower immune function in order to signal traits related to mate quality. This could explain the rising incidence of autoimmune diseases despite the fact that humans should have exceptionally high immune systems.

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Related Questions

Read the following passage:
I knew how to act and the right things to say, but I felt like a phony. I really cared about Lilly and I wanted her parents to like me, but this world was so different from mine. I wasn't comfortable in these clothes or around their friends. I felt like they could see right through me - like they knew where I came from and who my parents were. I decided to reveal my insecurities to Lilly, and she quickly put my mind at ease. She explained how much her family admired me and wanted to me to be a part of them.
Which statement describes the aesthetic impact the author most likely intends the resolution to have on the reader?
A. The author wants readers to gain a sense of relief and satisfaction.
B. The author wants readers to consider the purpose of family conflicts.
C. The author wants readers to feel disappointment and sadness.
D. The author wants readers to question the reliability of the narrator.

Answers

A the author wants readers to consider the purpose of family conflicts

The statement that describes the aesthetic impact the author most likely intends the resolution to have on the reader is "The author wants readers to gain a sense of relief and satisfaction. Option A is the correct answer.

In the given passage, the narrator feels like a phony and has insecurities regarding her dress and friends circle in the new world. However, when she decides to reveal her insecurities to Lilly, her friend puts her mind at ease and explains how much her family admired her. This revelation gives a sense of relief and satisfaction to the narrator. The passage focuses on the resolution of the conflict in the narrator's mind, which is resolved through Lilly's reassurance.

The author intends the readers to feel relieved and satisfied about the narrator's insecurities being resolved. Thus, option A is correct. The passage does not mention any family conflicts; thus, option B is incorrect. The passage does not evoke disappointment or sadness; thus, option C is incorrect. Finally, the passage does not present any doubts regarding the reliability of the narrator.

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write an introductory paragraph essay for similarities and
differences (compare and contrast) between municipal and biomedical
waste management in India.

Answers

Municipal waste management and biomedical waste management in India share similarities and differences in terms of their processes, regulations, and challenges.

Municipal waste management and biomedical waste management are both critical aspects of maintaining a clean and healthy environment in India. Similarities between the two include the need for proper collection, transportation, treatment, and disposal methods to prevent environmental pollution and public health risks.

Both types of waste management also require adherence to specific regulations and guidelines set by the government to ensure safe and effective practices. However, there are notable differences as well. Biomedical waste management involves handling hazardous waste materials generated from healthcare facilities, such as hospitals and clinics, which require specialized treatment and disposal methods to minimize the risk of infections and contamination.

Municipal waste management, on the other hand, deals with general waste generated by households, commercial establishments, and public spaces, focusing on waste reduction, segregation, recycling, and proper landfill management.

Challenges faced in municipal waste management include the sheer volume of waste generated, inadequate infrastructure, and limited public awareness, whereas biomedical waste management faces challenges related to segregation, proper storage, and training of healthcare personnel.

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