Biology MCQs

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The nutritional status of a large number of children can be calculated by knowing their body mass index .It is a physical measurement used to assess total amount of body fat. It is calculated by dividing your weight in kilograms (kg) by the square of your height in metres (m²). Depending on the BMI value calculated, one may be underweight, normal weight, overweight or obese.

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The thermoregulatory center in the hypothalamus controls the temperature at which the human body operates. There are two sets of thermoreceptors involved in the controlling of the body temperature.

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Buffalo milk has the highest fat content, which is on average twice as high as that of cow milk. The fat-to-protein ratio in buffalo milk is about 2:1.

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Haemophilia is a mostly inherited genetic disorder that impairs the body’s ability to make blood clots, a process needed to stop bleeding. This results in people bleeding longer after an injury, easy bruising, and an increased risk of bleeding inside joints or the brain.

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Wolf alpha pairs are usually monogamous with each other, but alpha males have been known to stray with other pack members, especially if they are closely related. Among red foxes, long considered extremely loyal, mate switching has also been shown.

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Race refers to classification of humans into relatively large and distinct population groups based on appearance through heritable phenotypic characteristics, often influenced by and correlated with culture, ethnicity and socio-economic status.
Dobzhansky (1970) has defined race in population concept as “Race are genetically distinct Mendelian populations. They are neither individuals nor particular genotypes; they consist of individuals who differ genetically among themselves.”

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Vitamin E was discovered by Evans and Bishop in 1922. Work in the 1930s revealed the chemical structure and biological function of alpha-tocopherol.

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The ascospore is a spore contained in an ascus; this type of spore is typical of fungi classified as ascomycetes.

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Scientists estimate that the human body contains around 37 trillion cells and 200 different cell types. This includes 50 billion fat cells and 2 billion heart muscle cells. The number of bacterial cells inside a human body is around 38 trillion. This is much closer to the estimated 30 trillion human cells in the body.
Scientists used data reported by others about individual organs and some mathematical modeling to obtain their results.

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Bryophytes are a proposed taxonomic division. These three groups of non-vascular land plants include liverworts, hornworts and mosses. They are notably limited in size and prefer moist habitats. They can survive in dry environments.