why are males usually the sex with exaggerated traits used in courtship?

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Answer 1

The phenomenon of males exhibiting exaggerated traits in courtship is often observed in the animal kingdom and is associated with sexual selection.

Sexual selection is a process in which certain traits or behaviors increase an individual's chances of mating and reproductive success. It can be driven by either intrasexual competition (competition between individuals of the same sex) or intersexual selection (mate choice by individuals of the opposite sex).It is worth noting that while exaggerated traits in males are commonly observed, there are also instances where females exhibit exaggerated traits or engage in courtship behaviors to attract males.

It's important to recognize that the specific traits and behaviors associated with courtship can vary greatly across different species, and evolutionary forces shape these characteristics in response to the unique ecological and social dynamics of each species.

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How are the RDA for almost all vitamin and mineral intakes set?
- Low, to reduce the risk of toxicity
- At the mean, to cover most healthy individuals
- Extremely high, to cover every single person
- High, to cover virtually all healthy individuals

Answers

The RDA (Recommended Dietary Allowance) for almost all vitamin and mineral intakes are set at a level that is high enough to cover virtually all healthy individuals (option d).

The Recommended Dietary Allowance (RDA) is the average daily amount of a nutrient needed to meet the nutritional needs of almost all (97% to 98%) healthy individuals. The RDA is intended to act as a guide to help people determine their nutrient requirements. For most nutrients, there are various factors that influence how much a person requires. Gender, age, overall health status, and physical activity level are all examples of such factors. As a result, there is a separate RDA for each nutrient and subpopulation group.

The RDA for almost all vitamin and mineral intakes are set at a level that is high enough to cover virtually all healthy individuals. They are not set at an extremely high level to cover every single person as this could lead to toxicity, and not set at the mean to cover most healthy individuals. Instead, they are set at a high level that covers virtually all healthy individuals (option d). This helps to ensure that most individuals are consuming enough of the nutrient to meet their daily needs.

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Which of the following is NOT symptomatic of heightened state anxiety?
a. profuse sweating
b. slowed breathing
c. increased muscle tension
d. inability to concentrate
e. sleeping difficulties

Answers

Heightened state anxiety is characterized by an increase in physiological arousal and psychological distress. The correct answer is b. slowed breathing.

Symptoms typically include increased heart rate, rapid breathing, sweating, muscle tension, and difficulty concentrating. These symptoms are often associated with a fight-or-flight response, where the body prepares itself to face a perceived threat or danger.

Slowed breathing, on the other hand, is not typically associated with heightened state anxiety. When anxiety levels rise, the body tends to exhibit faster and shallower breathing patterns as a result of increased sympathetic nervous system activity. Slowed breathing is more commonly observed in relaxation or calming techniques aimed at reducing anxiety, such as deep breathing exercises or meditation.

Therefore, among the given options, slowed breathing is the symptom that is not typically associated with heightened state anxiety.

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