QUES: Clinical immunology is the study of diseases caused by disorders of the immune system (failure, aberrant action, and malignant growth of the cellular elements of the system). It also involves diseases of other systems, where immune reactions play a part in the pathology and clinical features.

What are three problems of the immune system studied by clinical immunology?
What is the answer?
ANS: failure, aberrant action, and malignant growth
QUES: Birds have evolved a variety of mating behaviors, with the peacock tail being perhaps the most famous example of sexual selection and the Fisherian runaway. Commonly occurring sexual dimorphisms such as size and color differences are energetically costly attributes that signal competitive breeding situations. Many types of avian sexual selection have been identified; intersexual selection, also known as female choice; and intrasexual competition, where individuals of the more abundant sex compete with each other for the privilege to mate. Sexually selected traits often evolve to become more pronounced in competitive breeding situations until the trait begins to limit the individual’s fitness. Conflicts between an individual fitness and signaling adaptations ensure that sexually selected ornaments such as plumage coloration and courtship behavior are "honest" traits. Signals must be costly to ensure that only good-quality individuals can present these exaggerated sexual ornaments and behaviors.

What is it called when individuals of the more abundant sex compete with each other for the privilege to mate?
What is the answer?
ANS: intrasexual competition
QUES: The agglomeration of Kathmandu has not yet been officially defined. The urban area of the Kathmandu valley is split among three different districts (collections of local government units within a zone) which extend very little beyond the valley fringe, except towards the southern ranges, which have comparatively small population. They have the three highest population densities in the country. Within the districts lie VDCs (villages), 3 municipalities (Bhaktapur, Kirtipur, Madhyapur Thimi), 1 sub-metropolitan city (Lalitpur), and 1 metropolitan city (Kathmandu). Some district subdivisions remain legally villages yet are densely populated, Gonggabu VDC notably recorded a density over 20,000 people/km2. (2011 census). The following data table describes the districts considered part of the agglomeration:

How many districts make up the Kathmandu Valley urban area?
What is the answer?
ANS:
three