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  1. The genetic inability to metabolize the amino acid phenylalanine is known as Phenylketonuria (PKU). Phenylketonuria (PKU) Cause: It is caused by a mutation in the gene that encodes the enzyme phenylalanine hydroxylase (PAH), which is essential for converting phenylalanine into tyrosine. Effect: WithRead more

    The genetic inability to metabolize the amino acid phenylalanine is known as Phenylketonuria (PKU).

    Phenylketonuria (PKU)

    • Cause: It is caused by a mutation in the gene that encodes the enzyme phenylalanine hydroxylase (PAH), which is essential for converting phenylalanine into tyrosine.
    • Effect: Without this enzyme, phenylalanine accumulates in the body, leading to toxic levels that can cause brain damage and intellectual disabilities if not managed.
    • Inheritance: PKU is an autosomal recessive disorder, meaning a person must inherit two copies of the mutated gene (one from each parent) to develop the condition.
    • Management: It is managed by a strict diet low in phenylalanine, starting in infancy, to prevent the harmful effects of the amino acid buildup.

    Newborns are routinely screened for PKU as part of standard neonatal screening programs in many countries.

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AVG
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Why is Pluto not considered as a planet?

  1. This answer was edited.

    Pluto is not considered a planet because it does not meet all the criteria defined by the International Astronomical Union (IAU) in 2006 for a celestial body to be classified as a planet. Here are the three criteria set by the IAU for a celestial body to be considered a planet: Orbit around the Sun:Read more

    Pluto is not considered a planet because it does not meet all the criteria defined by the International Astronomical Union (IAU) in 2006 for a celestial body to be classified as a planet. Here are the three criteria set by the IAU for a celestial body to be considered a planet:

    1. Orbit around the Sun: The body must orbit the Sun.
    2. Sufficient Mass for a Nearly Round Shape: The body must have sufficient mass for its gravity to pull it into a nearly round (hydrostatic equilibrium) shape.
    3. Clear the Neighborhood around its Orbit: The body must have cleared its orbit of other debris, meaning it must be gravitationally dominant in its vicinity.

    While Pluto meets the first two criteria (it orbits the Sun and is nearly round), it fails the third criterion. Pluto shares its orbit with other objects in the Kuiper Belt, a region of the Solar System beyond Neptune filled with icy bodies and debris. It has not cleared its neighborhood of other celestial bodies. Because of this, Pluto was reclassified as a dwarf planet rather than a full-fledged planet. The reclassification demoted Pluto from its status as the ninth planet of the Solar System to one of the many dwarf planets.

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Vaishnavi
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What is soil erosion?How does it effect the biosphere?

  1. What is Soil Erosion? Soil erosion is the process by which the top layer of soil is removed or displaced by natural forces such as wind, water, ice, or human activities. It involves the wearing away of the fertile, nutrient-rich upper layer of soil, which is essential for plant growth and overall ecRead more

    What is Soil Erosion?

    Soil erosion is the process by which the top layer of soil is removed or displaced by natural forces such as wind, water, ice, or human activities. It involves the wearing away of the fertile, nutrient-rich upper layer of soil, which is essential for plant growth and overall ecosystem health.

    Effects of Soil Erosion on the Biosphere

    Soil erosion significantly impacts the biosphere in various ways:

    EffectDescription
    Loss of Fertile TopsoilThe top layer of soil, rich in nutrients and organic matter, is essential for plant growth. Its loss reduces agricultural productivity and affects plant life.
    Reduction in Agricultural YieldErosion leads to the loss of fertile land, decreasing crop yields and food security.
    Disruption of Aquatic EcosystemsSediments from eroded soil can pollute water bodies, leading to the destruction of aquatic habitats and biodiversity.
    Increased DesertificationContinuous erosion can turn fertile lands into deserts, leading to the expansion of arid regions.
    Climate Change ContributionSoil erosion can release stored carbon from the soil into the atmosphere, contributing to greenhouse gas emissions.
    Loss of BiodiversityErosion leads to habitat destruction, affecting both flora and fauna dependent on stable soil for survival.
    Water Cycle DisruptionSoil erosion affects the water retention capacity of land, leading to altered water cycles and increased runoff.
    Economic ImpactIt causes economic losses in agriculture, forestry, and infrastructure due to decreased land productivity and increased maintenance costs.

    By diminishing the quality of soil and degrading ecosystems, soil erosion poses a significant threat to the sustainability of the biosphere, impacting all living organisms that depend on the land for survival.

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