Phenotypic performance in different environments is central to understanding the evolutionary and ecological processes that drive adaptive divergence and, ultimately, speciation. Because habitat structure can affect an animal's foraging behaviour, anti-predator defences, and communication behaviour, it can influence both natural and sexual selection pressures. These selective pressures, in turn...

Androgen insensitivity syndrome (AIS) is a condition that results in the partial or complete inability of the cell to respond to androgens (androgenic hormones) that stimulate or control the development and maintenance of male physiological characteristics by binding to androgen receptors. The unresponsiveness of the cell to the presence of androgenic hormones can impair, or prevent, both the m...

The immunocompetence handicap hypothesis postulates that secondary sexual traits are honest signals of mate quality because the hormones (e.g. testosterone) needed to develop secondary sexual traits have immunosuppressive effects. The best support for predictions arising from the immunocompetence handicap hypothesis so far comes from studies of insects, although they lack male-specific hormones...

Spain [email protected] Gender differences in academic motivation of secondary school students-98-Abstract Introduction. The following study examines gender differences existing in various cognitive

Secondary school transition takes place earlier in Portugal than in most Western countries. This study aims to analyze the impact of this transition on the self-concept and self-esteem of Portuguese students, and to identify potential differential gender impacts. The sample included 377 students (Mage = 9.46; SD = .93; 52.8% boys). Self-report questionnaires were administered in 4th grade (midd...

Sex differentiation in forensic investigation utilises craniofacial morphology, tooth dimensions and DNA analysis [3,4]. It has been suggested that odontometrics plays an important role in determination of sex in young individuals where secondary sexual characteristics have not developed. In addition, the resistance of teeth to postmortem insults render them as a valuable tool in forensic inves...

early and regular blood transfusion therapy in patients with homozygous beta-thalassemia decreases the complications of severe anemia and prolongs survival. in the long term, however, the beneficial effects of transfusions are limited by the organ damage resulting from iron overload. endocrine complications in patients with thalassemia major in developing countries may be frequent due t o subop...

BACKGROUND Sexual assault is a traumatic event with potentially devastating lifelong effects on physical and mental health. Research has demonstrated that individuals who experience sexual assault during childhood are more likely to engage in risky behaviors later in life, such as smoking, alcohol and drug use, and disordered eating habits, which may increase the risk of developing a chronic di...